Home / 121,214.20-181,821.30-77,036.80

Finding the Fourth Proportional to 121,214.20, 181,821.30 and 77,036.80

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Solution

The fourth proportional to 121,214.20, 181,821.30 and 77,036.80 is: 115,555.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,214.20 : 181,821.30 = 77,036.80 : x
  2. Step 2: Convert to fraction form
    121,214.20/181,821.30 = 77,036.80/x
  3. Step 3: Cross multiply
    121,214.20x = 181,821.30 × 77,036.80
  4. Step 4: Simplify right side
    121,214.20x = 14,006,931,123.84
  5. Step 5: Solve for x
    x = 14,006,931,123.84/121,214.20
  6. Step 6: Final answer
    x = 115,555.20

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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.