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Finding the Fourth Proportional to 81,484.48, 112,449.28 and 45,674.56

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Solution

The fourth proportional to 81,484.48, 112,449.28 and 45,674.56 is: 63,031.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,484.48 : 112,449.28 = 45,674.56 : x
  2. Step 2: Convert to fraction form
    81,484.48/112,449.28 = 45,674.56/x
  3. Step 3: Cross multiply
    81,484.48x = 112,449.28 × 45,674.56
  4. Step 4: Simplify right side
    81,484.48x = 5,136,071,386.32
  5. Step 5: Solve for x
    x = 5,136,071,386.32/81,484.48
  6. Step 6: Final answer
    x = 63,031.28

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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.