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Finding the Fourth Proportional to 99,063.85, 136,708.11 and 56,623.29

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Solution

The fourth proportional to 99,063.85, 136,708.11 and 56,623.29 is: 78,140.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,063.85 : 136,708.11 = 56,623.29 : x
  2. Step 2: Convert to fraction form
    99,063.85/136,708.11 = 56,623.29/x
  3. Step 3: Cross multiply
    99,063.85x = 136,708.11 × 56,623.29
  4. Step 4: Simplify right side
    99,063.85x = 7,740,862,957.88
  5. Step 5: Solve for x
    x = 7,740,862,957.88/99,063.85
  6. Step 6: Final answer
    x = 78,140.14

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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.