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Finding the Fourth Proportional to 137,799,861.60, 206,699,792.40 and 86,781,525.60

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Solution

The fourth proportional to 137,799,861.60, 206,699,792.40 and 86,781,525.60 is: 130,172,288.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,799,861.60 : 206,699,792.40 = 86,781,525.60 : x
  2. Step 2: Convert to fraction form
    137,799,861.60/206,699,792.40 = 86,781,525.60/x
  3. Step 3: Cross multiply
    137,799,861.60x = 206,699,792.40 × 86,781,525.60
  4. Step 4: Simplify right side
    137,799,861.60x = 17,937,723,325,675,284
  5. Step 5: Solve for x
    x = 17,937,723,325,675,284/137,799,861.60
  6. Step 6: Final answer
    x = 130,172,288.40

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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.