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Finding the Fourth Proportional to 72,430.70, 108,609.60 and 42,857.60

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Solution

The fourth proportional to 72,430.70, 108,609.60 and 42,857.60 is: 64,264.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,430.70 : 108,609.60 = 42,857.60 : x
  2. Step 2: Convert to fraction form
    72,430.70/108,609.60 = 42,857.60/x
  3. Step 3: Cross multiply
    72,430.70x = 108,609.60 × 42,857.60
  4. Step 4: Simplify right side
    72,430.70x = 4,654,746,792.96
  5. Step 5: Solve for x
    x = 4,654,746,792.96/72,430.70
  6. Step 6: Final answer
    x = 64,264.83

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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.