Home / 99,421.90-149,132.85-81,854.82

Finding the Fourth Proportional to 99,421.90, 149,132.85 and 81,854.82

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Solution

The fourth proportional to 99,421.90, 149,132.85 and 81,854.82 is: 122,782.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,421.90 : 149,132.85 = 81,854.82 : x
  2. Step 2: Convert to fraction form
    99,421.90/149,132.85 = 81,854.82/x
  3. Step 3: Cross multiply
    99,421.90x = 149,132.85 × 81,854.82
  4. Step 4: Simplify right side
    99,421.90x = 12,207,242,285.88
  5. Step 5: Solve for x
    x = 12,207,242,285.88/99,421.90
  6. Step 6: Final answer
    x = 122,782.23

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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.