Home / 121,417.40-181,931.70-79,815.80

Finding the Fourth Proportional to 121,417.40, 181,931.70 and 79,815.80

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Solution

The fourth proportional to 121,417.40, 181,931.70 and 79,815.80 is: 119,595.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,417.40 : 181,931.70 = 79,815.80 : x
  2. Step 2: Convert to fraction form
    121,417.40/181,931.70 = 79,815.80/x
  3. Step 3: Cross multiply
    121,417.40x = 181,931.70 × 79,815.80
  4. Step 4: Simplify right side
    121,417.40x = 14,521,024,180.86
  5. Step 5: Solve for x
    x = 14,521,024,180.86/121,417.40
  6. Step 6: Final answer
    x = 119,595.91

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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.