Home / 138,870.28-208,316.22-45,385.48

Finding the Fourth Proportional to 138,870.28, 208,316.22 and 45,385.48

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Solution

The fourth proportional to 138,870.28, 208,316.22 and 45,385.48 is: 68,081.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,870.28 : 208,316.22 = 45,385.48 : x
  2. Step 2: Convert to fraction form
    138,870.28/208,316.22 = 45,385.48/x
  3. Step 3: Cross multiply
    138,870.28x = 208,316.22 × 45,385.48
  4. Step 4: Simplify right side
    138,870.28x = 9,454,531,636.49
  5. Step 5: Solve for x
    x = 9,454,531,636.49/138,870.28
  6. Step 6: Final answer
    x = 68,081.75

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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.