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Finding the Fourth Proportional to 39,987.60, 59,981.40 and 39,404.40

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Solution

The fourth proportional to 39,987.60, 59,981.40 and 39,404.40 is: 59,106.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,987.60 : 59,981.40 = 39,404.40 : x
  2. Step 2: Convert to fraction form
    39,987.60/59,981.40 = 39,404.40/x
  3. Step 3: Cross multiply
    39,987.60x = 59,981.40 × 39,404.40
  4. Step 4: Simplify right side
    39,987.60x = 2,363,531,078.16
  5. Step 5: Solve for x
    x = 2,363,531,078.16/39,987.60
  6. Step 6: Final answer
    x = 59,106.60

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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.