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Finding the Fourth Proportional to 151,439.40, 208,985.40 and 83,456.91

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Solution

The fourth proportional to 151,439.40, 208,985.40 and 83,456.91 is: 115,170.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,439.40 : 208,985.40 = 83,456.91 : x
  2. Step 2: Convert to fraction form
    151,439.40/208,985.40 = 83,456.91/x
  3. Step 3: Cross multiply
    151,439.40x = 208,985.40 × 83,456.91
  4. Step 4: Simplify right side
    151,439.40x = 17,441,275,719.11
  5. Step 5: Solve for x
    x = 17,441,275,719.11/151,439.40
  6. Step 6: Final answer
    x = 115,170.00

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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.