Home / 129,681.86-178,957.40-72,322.93

Finding the Fourth Proportional to 129,681.86, 178,957.40 and 72,322.93

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Solution

The fourth proportional to 129,681.86, 178,957.40 and 72,322.93 is: 99,803.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,681.86 : 178,957.40 = 72,322.93 : x
  2. Step 2: Convert to fraction form
    129,681.86/178,957.40 = 72,322.93/x
  3. Step 3: Cross multiply
    129,681.86x = 178,957.40 × 72,322.93
  4. Step 4: Simplify right side
    129,681.86x = 12,942,723,246.60
  5. Step 5: Solve for x
    x = 12,942,723,246.60/129,681.86
  6. Step 6: Final answer
    x = 99,803.65

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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.