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Finding the Fourth Proportional to 83,688.62, 115,489.93 and 45,447.89

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Solution

The fourth proportional to 83,688.62, 115,489.93 and 45,447.89 is: 62,717.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,688.62 : 115,489.93 = 45,447.89 : x
  2. Step 2: Convert to fraction form
    83,688.62/115,489.93 = 45,447.89/x
  3. Step 3: Cross multiply
    83,688.62x = 115,489.93 × 45,447.89
  4. Step 4: Simplify right side
    83,688.62x = 5,248,773,809.85
  5. Step 5: Solve for x
    x = 5,248,773,809.85/83,688.62
  6. Step 6: Final answer
    x = 62,717.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.