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Finding the Fourth Proportional to 81,615.48, 112,626.48 and 45,807.52

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Solution

The fourth proportional to 81,615.48, 112,626.48 and 45,807.52 is: 63,212.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,615.48 : 112,626.48 = 45,807.52 : x
  2. Step 2: Convert to fraction form
    81,615.48/112,626.48 = 45,807.52/x
  3. Step 3: Cross multiply
    81,615.48x = 112,626.48 × 45,807.52
  4. Step 4: Simplify right side
    81,615.48x = 5,159,139,735.13
  5. Step 5: Solve for x
    x = 5,159,139,735.13/81,615.48
  6. Step 6: Final answer
    x = 63,212.76

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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.