Home / 129,018.29-193,428.95-72,921.74

Finding the Fourth Proportional to 129,018.29, 193,428.95 and 72,921.74

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Solution

The fourth proportional to 129,018.29, 193,428.95 and 72,921.74 is: 109,326.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,018.29 : 193,428.95 = 72,921.74 : x
  2. Step 2: Convert to fraction form
    129,018.29/193,428.95 = 72,921.74/x
  3. Step 3: Cross multiply
    129,018.29x = 193,428.95 × 72,921.74
  4. Step 4: Simplify right side
    129,018.29x = 14,105,174,268.62
  5. Step 5: Solve for x
    x = 14,105,174,268.62/129,018.29
  6. Step 6: Final answer
    x = 109,326.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.