Home / 145,143.38-200,284.17-81,468.74

Finding the Fourth Proportional to 145,143.38, 200,284.17 and 81,468.74

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Solution

The fourth proportional to 145,143.38, 200,284.17 and 81,468.74 is: 112,419.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,143.38 : 200,284.17 = 81,468.74 : x
  2. Step 2: Convert to fraction form
    145,143.38/200,284.17 = 81,468.74/x
  3. Step 3: Cross multiply
    145,143.38x = 200,284.17 × 81,468.74
  4. Step 4: Simplify right side
    145,143.38x = 16,316,898,971.85
  5. Step 5: Solve for x
    x = 16,316,898,971.85/145,143.38
  6. Step 6: Final answer
    x = 112,419.17

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1.5x scale

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.