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Finding the Fourth Proportional to 81,430.66, 112,372.92 and 45,621.10

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Solution

The fourth proportional to 81,430.66, 112,372.92 and 45,621.10 is: 62,956.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430.66 : 112,372.92 = 45,621.10 : x
  2. Step 2: Convert to fraction form
    81,430.66/112,372.92 = 45,621.10/x
  3. Step 3: Cross multiply
    81,430.66x = 112,372.92 × 45,621.10
  4. Step 4: Simplify right side
    81,430.66x = 5,126,576,220.61
  5. Step 5: Solve for x
    x = 5,126,576,220.61/81,430.66
  6. Step 6: Final answer
    x = 62,956.34

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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.