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Finding the Fourth Proportional to 138,949.80, 208,486.95 and 64,029.84

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Solution

The fourth proportional to 138,949.80, 208,486.95 and 64,029.84 is: 96,073.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,949.80 : 208,486.95 = 64,029.84 : x
  2. Step 2: Convert to fraction form
    138,949.80/208,486.95 = 64,029.84/x
  3. Step 3: Cross multiply
    138,949.80x = 208,486.95 × 64,029.84
  4. Step 4: Simplify right side
    138,949.80x = 13,349,386,050.59
  5. Step 5: Solve for x
    x = 13,349,386,050.59/138,949.80
  6. Step 6: Final answer
    x = 96,073.45

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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.