Home / 129,623.16-178,885.47-72,262.47

Finding the Fourth Proportional to 129,623.16, 178,885.47 and 72,262.47

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Solution

The fourth proportional to 129,623.16, 178,885.47 and 72,262.47 is: 99,725.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,623.16 : 178,885.47 = 72,262.47 : x
  2. Step 2: Convert to fraction form
    129,623.16/178,885.47 = 72,262.47/x
  3. Step 3: Cross multiply
    129,623.16x = 178,885.47 × 72,262.47
  4. Step 4: Simplify right side
    129,623.16x = 12,926,705,909.31
  5. Step 5: Solve for x
    x = 12,926,705,909.31/129,623.16
  6. Step 6: Final answer
    x = 99,725.28

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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.