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Finding the Fourth Proportional to 81,485.60, 112,449.10 and 45,675.56

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Solution

The fourth proportional to 81,485.60, 112,449.10 and 45,675.56 is: 63,031.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,485.60 : 112,449.10 = 45,675.56 : x
  2. Step 2: Convert to fraction form
    81,485.60/112,449.10 = 45,675.56/x
  3. Step 3: Cross multiply
    81,485.60x = 112,449.10 × 45,675.56
  4. Step 4: Simplify right side
    81,485.60x = 5,136,175,614.00
  5. Step 5: Solve for x
    x = 5,136,175,614.00/81,485.60
  6. Step 6: Final answer
    x = 63,031.70

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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.