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Finding the Fourth Proportional to 78,332.34, 117,459.92 and 28,404.94

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Solution

The fourth proportional to 78,332.34, 117,459.92 and 28,404.94 is: 42,593.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,332.34 : 117,459.92 = 28,404.94 : x
  2. Step 2: Convert to fraction form
    78,332.34/117,459.92 = 28,404.94/x
  3. Step 3: Cross multiply
    78,332.34x = 117,459.92 × 28,404.94
  4. Step 4: Simplify right side
    78,332.34x = 3,336,441,980.00
  5. Step 5: Solve for x
    x = 3,336,441,980.00/78,332.34
  6. Step 6: Final answer
    x = 42,593.42

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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.