Home / 138,748.60-208,071.70-45,257.40

Finding the Fourth Proportional to 138,748.60, 208,071.70 and 45,257.40

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Solution

The fourth proportional to 138,748.60, 208,071.70 and 45,257.40 is: 67,869.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,748.60 : 208,071.70 = 45,257.40 : x
  2. Step 2: Convert to fraction form
    138,748.60/208,071.70 = 45,257.40/x
  3. Step 3: Cross multiply
    138,748.60x = 208,071.70 × 45,257.40
  4. Step 4: Simplify right side
    138,748.60x = 9,416,784,155.58
  5. Step 5: Solve for x
    x = 9,416,784,155.58/138,748.60
  6. Step 6: Final answer
    x = 67,869.40

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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.