Home / 99,815.46-137,740.55-56,790.96

Finding the Fourth Proportional to 99,815.46, 137,740.55 and 56,790.96

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Solution

The fourth proportional to 99,815.46, 137,740.55 and 56,790.96 is: 78,368.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,815.46 : 137,740.55 = 56,790.96 : x
  2. Step 2: Convert to fraction form
    99,815.46/137,740.55 = 56,790.96/x
  3. Step 3: Cross multiply
    99,815.46x = 137,740.55 × 56,790.96
  4. Step 4: Simplify right side
    99,815.46x = 7,822,417,781.47
  5. Step 5: Solve for x
    x = 7,822,417,781.47/99,815.46
  6. Step 6: Final answer
    x = 78,368.80

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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.