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Finding the Fourth Proportional to 99,124, 136,808.40 and 56,684.32

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Solution

The fourth proportional to 99,124, 136,808.40 and 56,684.32 is: 78,234.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,124 : 136,808.40 = 56,684.32 : x
  2. Step 2: Convert to fraction form
    99,124/136,808.40 = 56,684.32/x
  3. Step 3: Cross multiply
    99,124x = 136,808.40 × 56,684.32
  4. Step 4: Simplify right side
    99,124x = 7,754,891,124.29
  5. Step 5: Solve for x
    x = 7,754,891,124.29/99,124
  6. Step 6: Final answer
    x = 78,234.24

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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.