Home / 87,389.02-130,445.55-74,988.73

Finding the Fourth Proportional to 87,389.02, 130,445.55 and 74,988.73

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Solution

The fourth proportional to 87,389.02, 130,445.55 and 74,988.73 is: 111,935.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,389.02 : 130,445.55 = 74,988.73 : x
  2. Step 2: Convert to fraction form
    87,389.02/130,445.55 = 74,988.73/x
  3. Step 3: Cross multiply
    87,389.02x = 130,445.55 × 74,988.73
  4. Step 4: Simplify right side
    87,389.02x = 9,781,946,128.65
  5. Step 5: Solve for x
    x = 9,781,946,128.65/87,389.02
  6. Step 6: Final answer
    x = 111,935.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.