Home / 129,681.11-178,956.37-72,322.18

Finding the Fourth Proportional to 129,681.11, 178,956.37 and 72,322.18

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Solution

The fourth proportional to 129,681.11, 178,956.37 and 72,322.18 is: 99,802.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.11 : 178,956.37 = 72,322.18 : x
  2. Step 2: Convert to fraction form
    129,681.11/178,956.37 = 72,322.18/x
  3. Step 3: Cross multiply
    129,681.11x = 178,956.37 × 72,322.18
  4. Step 4: Simplify right side
    129,681.11x = 12,942,514,355.90
  5. Step 5: Solve for x
    x = 12,942,514,355.90/129,681.11
  6. Step 6: Final answer
    x = 99,802.62

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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.