Home / 129,437.01-178,581.38-72,837.45

Finding the Fourth Proportional to 129,437.01, 178,581.38 and 72,837.45

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Solution

The fourth proportional to 129,437.01, 178,581.38 and 72,837.45 is: 100,492.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,437.01 : 178,581.38 = 72,837.45 : x
  2. Step 2: Convert to fraction form
    129,437.01/178,581.38 = 72,837.45/x
  3. Step 3: Cross multiply
    129,437.01x = 178,581.38 × 72,837.45
  4. Step 4: Simplify right side
    129,437.01x = 13,007,411,972.49
  5. Step 5: Solve for x
    x = 13,007,411,972.49/129,437.01
  6. Step 6: Final answer
    x = 100,492.22

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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.