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Finding the Fourth Proportional to 81,412.40, 112,347.79 and 45,602.30

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Solution

The fourth proportional to 81,412.40, 112,347.79 and 45,602.30 is: 62,930.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,412.40 : 112,347.79 = 45,602.30 : x
  2. Step 2: Convert to fraction form
    81,412.40/112,347.79 = 45,602.30/x
  3. Step 3: Cross multiply
    81,412.40x = 112,347.79 × 45,602.30
  4. Step 4: Simplify right side
    81,412.40x = 5,123,316,948.17
  5. Step 5: Solve for x
    x = 5,123,316,948.17/81,412.40
  6. Step 6: Final answer
    x = 62,930.43

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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.