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Finding the Fourth Proportional to 83,490.45, 115,215.12 and 45,764.70

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Solution

The fourth proportional to 83,490.45, 115,215.12 and 45,764.70 is: 63,154.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,490.45 : 115,215.12 = 45,764.70 : x
  2. Step 2: Convert to fraction form
    83,490.45/115,215.12 = 45,764.70/x
  3. Step 3: Cross multiply
    83,490.45x = 115,215.12 × 45,764.70
  4. Step 4: Simplify right side
    83,490.45x = 5,272,785,402.26
  5. Step 5: Solve for x
    x = 5,272,785,402.26/83,490.45
  6. Step 6: Final answer
    x = 63,154.35

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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.