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Finding the Fourth Proportional to 145,337.69, 200,565.21 and 81,675.49

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Solution

The fourth proportional to 145,337.69, 200,565.21 and 81,675.49 is: 112,711.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,337.69 : 200,565.21 = 81,675.49 : x
  2. Step 2: Convert to fraction form
    145,337.69/200,565.21 = 81,675.49/x
  3. Step 3: Cross multiply
    145,337.69x = 200,565.21 × 81,675.49
  4. Step 4: Simplify right side
    145,337.69x = 16,381,261,984.63
  5. Step 5: Solve for x
    x = 16,381,261,984.63/145,337.69
  6. Step 6: Final answer
    x = 112,711.72

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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.