Home / 87,931.88-131,896-21,372.40

Finding the Fourth Proportional to 87,931.88, 131,896 and 21,372.40

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Solution

The fourth proportional to 87,931.88, 131,896 and 21,372.40 is: 32,058.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,931.88 : 131,896 = 21,372.40 : x
  2. Step 2: Convert to fraction form
    87,931.88/131,896 = 21,372.40/x
  3. Step 3: Cross multiply
    87,931.88x = 131,896 × 21,372.40
  4. Step 4: Simplify right side
    87,931.88x = 2,818,934,070.40
  5. Step 5: Solve for x
    x = 2,818,934,070.40/87,931.88
  6. Step 6: Final answer
    x = 32,058.16

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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.