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Finding the Fourth Proportional to 78,404.40, 117,618.12 and 25,801.20

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Solution

The fourth proportional to 78,404.40, 117,618.12 and 25,801.20 is: 38,705.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,404.40 : 117,618.12 = 25,801.20 : x
  2. Step 2: Convert to fraction form
    78,404.40/117,618.12 = 25,801.20/x
  3. Step 3: Cross multiply
    78,404.40x = 117,618.12 × 25,801.20
  4. Step 4: Simplify right side
    78,404.40x = 3,034,688,637.74
  5. Step 5: Solve for x
    x = 3,034,688,637.74/78,404.40
  6. Step 6: Final answer
    x = 38,705.59

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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.