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Finding the Fourth Proportional to 203,630,603.60, 305,445,905.40 and 67,315,987.10

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Solution

The fourth proportional to 203,630,603.60, 305,445,905.40 and 67,315,987.10 is: 100,973,980.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,630,603.60 : 305,445,905.40 = 67,315,987.10 : x
  2. Step 2: Convert to fraction form
    203,630,603.60/305,445,905.40 = 67,315,987.10/x
  3. Step 3: Cross multiply
    203,630,603.60x = 305,445,905.40 × 67,315,987.10
  4. Step 4: Simplify right side
    203,630,603.60x = 20,561,392,627,654,216
  5. Step 5: Solve for x
    x = 20,561,392,627,654,216/203,630,603.60
  6. Step 6: Final answer
    x = 100,973,980.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.