Home / 87,280.40-130,834.20-42,870.80

Finding the Fourth Proportional to 87,280.40, 130,834.20 and 42,870.80

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Solution

The fourth proportional to 87,280.40, 130,834.20 and 42,870.80 is: 64,263.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,280.40 : 130,834.20 = 42,870.80 : x
  2. Step 2: Convert to fraction form
    87,280.40/130,834.20 = 42,870.80/x
  3. Step 3: Cross multiply
    87,280.40x = 130,834.20 × 42,870.80
  4. Step 4: Simplify right side
    87,280.40x = 5,608,966,821.36
  5. Step 5: Solve for x
    x = 5,608,966,821.36/87,280.40
  6. Step 6: Final answer
    x = 64,263.76

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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.