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Finding the Fourth Proportional to 78,682.20, 118,023.30 and 63,130.20

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Solution

The fourth proportional to 78,682.20, 118,023.30 and 63,130.20 is: 94,695.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,682.20 : 118,023.30 = 63,130.20 : x
  2. Step 2: Convert to fraction form
    78,682.20/118,023.30 = 63,130.20/x
  3. Step 3: Cross multiply
    78,682.20x = 118,023.30 × 63,130.20
  4. Step 4: Simplify right side
    78,682.20x = 7,450,834,533.66
  5. Step 5: Solve for x
    x = 7,450,834,533.66/78,682.20
  6. Step 6: Final answer
    x = 94,695.30

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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.