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Finding the Fourth Proportional to 81,708.49, 112,760.63 and 45,897.72

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Solution

The fourth proportional to 81,708.49, 112,760.63 and 45,897.72 is: 63,340.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,708.49 : 112,760.63 = 45,897.72 : x
  2. Step 2: Convert to fraction form
    81,708.49/112,760.63 = 45,897.72/x
  3. Step 3: Cross multiply
    81,708.49x = 112,760.63 × 45,897.72
  4. Step 4: Simplify right side
    81,708.49x = 5,175,455,822.76
  5. Step 5: Solve for x
    x = 5,175,455,822.76/81,708.49
  6. Step 6: Final answer
    x = 63,340.49

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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.