Home / 121,126.20-181,538.10-61,985.40

Finding the Fourth Proportional to 121,126.20, 181,538.10 and 61,985.40

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Solution

The fourth proportional to 121,126.20, 181,538.10 and 61,985.40 is: 92,900.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,126.20 : 181,538.10 = 61,985.40 : x
  2. Step 2: Convert to fraction form
    121,126.20/181,538.10 = 61,985.40/x
  3. Step 3: Cross multiply
    121,126.20x = 181,538.10 × 61,985.40
  4. Step 4: Simplify right side
    121,126.20x = 11,252,711,743.74
  5. Step 5: Solve for x
    x = 11,252,711,743.74/121,126.20
  6. Step 6: Final answer
    x = 92,900.72

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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.