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Finding the Fourth Proportional to 92,161.04, 138,265.70 and 28,978.61

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Solution

The fourth proportional to 92,161.04, 138,265.70 and 28,978.61 is: 43,475.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,161.04 : 138,265.70 = 28,978.61 : x
  2. Step 2: Convert to fraction form
    92,161.04/138,265.70 = 28,978.61/x
  3. Step 3: Cross multiply
    92,161.04x = 138,265.70 × 28,978.61
  4. Step 4: Simplify right side
    92,161.04x = 4,006,746,960.46
  5. Step 5: Solve for x
    x = 4,006,746,960.46/92,161.04
  6. Step 6: Final answer
    x = 43,475.50

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1.5x scale

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.