Home / 99,627.88-137,478.18-57,177.40

Finding the Fourth Proportional to 99,627.88, 137,478.18 and 57,177.40

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Solution

The fourth proportional to 99,627.88, 137,478.18 and 57,177.40 is: 78,900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,627.88 : 137,478.18 = 57,177.40 : x
  2. Step 2: Convert to fraction form
    99,627.88/137,478.18 = 57,177.40/x
  3. Step 3: Cross multiply
    99,627.88x = 137,478.18 × 57,177.40
  4. Step 4: Simplify right side
    99,627.88x = 7,860,644,889.13
  5. Step 5: Solve for x
    x = 7,860,644,889.13/99,627.88
  6. Step 6: Final answer
    x = 78,900.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.