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Finding the Fourth Proportional to 83,679.40, 115,477.15 and 45,438.62

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Solution

The fourth proportional to 83,679.40, 115,477.15 and 45,438.62 is: 62,705.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,679.40 : 115,477.15 = 45,438.62 : x
  2. Step 2: Convert to fraction form
    83,679.40/115,477.15 = 45,438.62/x
  3. Step 3: Cross multiply
    83,679.40x = 115,477.15 × 45,438.62
  4. Step 4: Simplify right side
    83,679.40x = 5,247,121,646.55
  5. Step 5: Solve for x
    x = 5,247,121,646.55/83,679.40
  6. Step 6: Final answer
    x = 62,705.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.