Home / 138,713.32-208,000.70-45,207.40

Finding the Fourth Proportional to 138,713.32, 208,000.70 and 45,207.40

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Solution

The fourth proportional to 138,713.32, 208,000.70 and 45,207.40 is: 67,788.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,713.32 : 208,000.70 = 45,207.40 : x
  2. Step 2: Convert to fraction form
    138,713.32/208,000.70 = 45,207.40/x
  3. Step 3: Cross multiply
    138,713.32x = 208,000.70 × 45,207.40
  4. Step 4: Simplify right side
    138,713.32x = 9,403,170,845.18
  5. Step 5: Solve for x
    x = 9,403,170,845.18/138,713.32
  6. Step 6: Final answer
    x = 67,788.52

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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.