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Finding the Fourth Proportional to 87,040, 130,541.68 and 42,622

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Solution

The fourth proportional to 87,040, 130,541.68 and 42,622 is: 63,924.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,040 : 130,541.68 = 42,622 : x
  2. Step 2: Convert to fraction form
    87,040/130,541.68 = 42,622/x
  3. Step 3: Cross multiply
    87,040x = 130,541.68 × 42,622
  4. Step 4: Simplify right side
    87,040x = 5,563,947,484.96
  5. Step 5: Solve for x
    x = 5,563,947,484.96/87,040
  6. Step 6: Final answer
    x = 63,924.03

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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.