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Finding the Fourth Proportional to 92,854.62, 128,139.90 and 54,615.76

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Solution

The fourth proportional to 92,854.62, 128,139.90 and 54,615.76 is: 75,370.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,854.62 : 128,139.90 = 54,615.76 : x
  2. Step 2: Convert to fraction form
    92,854.62/128,139.90 = 54,615.76/x
  3. Step 3: Cross multiply
    92,854.62x = 128,139.90 × 54,615.76
  4. Step 4: Simplify right side
    92,854.62x = 6,998,458,024.82
  5. Step 5: Solve for x
    x = 6,998,458,024.82/92,854.62
  6. Step 6: Final answer
    x = 75,370.06

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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.