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Finding the Fourth Proportional to 81,459.60, 112,394.64 and 47,447.52

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Solution

The fourth proportional to 81,459.60, 112,394.64 and 47,447.52 is: 65,466.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,459.60 : 112,394.64 = 47,447.52 : x
  2. Step 2: Convert to fraction form
    81,459.60/112,394.64 = 47,447.52/x
  3. Step 3: Cross multiply
    81,459.60x = 112,394.64 × 47,447.52
  4. Step 4: Simplify right side
    81,459.60x = 5,332,846,929.29
  5. Step 5: Solve for x
    x = 5,332,846,929.29/81,459.60
  6. Step 6: Final answer
    x = 65,466.16

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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.