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Finding the Fourth Proportional to 55,005.40, 82,510.80 and 28,761.40

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Solution

The fourth proportional to 55,005.40, 82,510.80 and 28,761.40 is: 43,143.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,005.40 : 82,510.80 = 28,761.40 : x
  2. Step 2: Convert to fraction form
    55,005.40/82,510.80 = 28,761.40/x
  3. Step 3: Cross multiply
    55,005.40x = 82,510.80 × 28,761.40
  4. Step 4: Simplify right side
    55,005.40x = 2,373,126,123.12
  5. Step 5: Solve for x
    x = 2,373,126,123.12/55,005.40
  6. Step 6: Final answer
    x = 43,143.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.