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Finding the Fourth Proportional to 83,434.70, 124,407.80 and 74,161.82

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Solution

The fourth proportional to 83,434.70, 124,407.80 and 74,161.82 is: 110,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,434.70 : 124,407.80 = 74,161.82 : x
  2. Step 2: Convert to fraction form
    83,434.70/124,407.80 = 74,161.82/x
  3. Step 3: Cross multiply
    83,434.70x = 124,407.80 × 74,161.82
  4. Step 4: Simplify right side
    83,434.70x = 9,226,308,870.20
  5. Step 5: Solve for x
    x = 9,226,308,870.20/83,434.70
  6. Step 6: Final answer
    x = 110,581.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.