Home / 153,987.39-212,501.21-85,076.75

Finding the Fourth Proportional to 153,987.39, 212,501.21 and 85,076.75

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Solution

The fourth proportional to 153,987.39, 212,501.21 and 85,076.75 is: 117,405.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,987.39 : 212,501.21 = 85,076.75 : x
  2. Step 2: Convert to fraction form
    153,987.39/212,501.21 = 85,076.75/x
  3. Step 3: Cross multiply
    153,987.39x = 212,501.21 × 85,076.75
  4. Step 4: Simplify right side
    153,987.39x = 18,078,912,423.74
  5. Step 5: Solve for x
    x = 18,078,912,423.74/153,987.39
  6. Step 6: Final answer
    x = 117,405.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.