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Finding the Fourth Proportional to 58,086.80, 87,130.20 and 57,649.40

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Solution

The fourth proportional to 58,086.80, 87,130.20 and 57,649.40 is: 86,474.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,086.80 : 87,130.20 = 57,649.40 : x
  2. Step 2: Convert to fraction form
    58,086.80/87,130.20 = 57,649.40/x
  3. Step 3: Cross multiply
    58,086.80x = 87,130.20 × 57,649.40
  4. Step 4: Simplify right side
    58,086.80x = 5,023,003,751.88
  5. Step 5: Solve for x
    x = 5,023,003,751.88/58,086.80
  6. Step 6: Final answer
    x = 86,474.10

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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.