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Finding the Fourth Proportional to 87,448.62, 130,490.88 and 78,023.85

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Solution

The fourth proportional to 87,448.62, 130,490.88 and 78,023.85 is: 116,427.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,448.62 : 130,490.88 = 78,023.85 : x
  2. Step 2: Convert to fraction form
    87,448.62/130,490.88 = 78,023.85/x
  3. Step 3: Cross multiply
    87,448.62x = 130,490.88 × 78,023.85
  4. Step 4: Simplify right side
    87,448.62x = 10,181,400,457.37
  5. Step 5: Solve for x
    x = 10,181,400,457.37/87,448.62
  6. Step 6: Final answer
    x = 116,427.23

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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.