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Finding the Fourth Proportional to 39,129.60, 58,564.80 and 36,019.20

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Solution

The fourth proportional to 39,129.60, 58,564.80 and 36,019.20 is: 53,909.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,129.60 : 58,564.80 = 36,019.20 : x
  2. Step 2: Convert to fraction form
    39,129.60/58,564.80 = 36,019.20/x
  3. Step 3: Cross multiply
    39,129.60x = 58,564.80 × 36,019.20
  4. Step 4: Simplify right side
    39,129.60x = 2,109,457,244.16
  5. Step 5: Solve for x
    x = 2,109,457,244.16/39,129.60
  6. Step 6: Final answer
    x = 53,909.50

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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.