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Finding the Fourth Proportional to 81,465.60, 112,417.20 and 45,655.20

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Solution

The fourth proportional to 81,465.60, 112,417.20 and 45,655.20 is: 63,001.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,465.60 : 112,417.20 = 45,655.20 : x
  2. Step 2: Convert to fraction form
    81,465.60/112,417.20 = 45,655.20/x
  3. Step 3: Cross multiply
    81,465.60x = 112,417.20 × 45,655.20
  4. Step 4: Simplify right side
    81,465.60x = 5,132,429,749.44
  5. Step 5: Solve for x
    x = 5,132,429,749.44/81,465.60
  6. Step 6: Final answer
    x = 63,001.19

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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.