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Finding the Fourth Proportional to 71,386.60, 107,079.90 and 45,005.80

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Solution

The fourth proportional to 71,386.60, 107,079.90 and 45,005.80 is: 67,508.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,386.60 : 107,079.90 = 45,005.80 : x
  2. Step 2: Convert to fraction form
    71,386.60/107,079.90 = 45,005.80/x
  3. Step 3: Cross multiply
    71,386.60x = 107,079.90 × 45,005.80
  4. Step 4: Simplify right side
    71,386.60x = 4,819,216,563.42
  5. Step 5: Solve for x
    x = 4,819,216,563.42/71,386.60
  6. Step 6: Final answer
    x = 67,508.70

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1.5x scale

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.