Home / 121,344,139.40-182,016,209.10-78,345,969.80

Finding the Fourth Proportional to 121,344,139.40, 182,016,209.10 and 78,345,969.80

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Solution

The fourth proportional to 121,344,139.40, 182,016,209.10 and 78,345,969.80 is: 117,518,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,344,139.40 : 182,016,209.10 = 78,345,969.80 : x
  2. Step 2: Convert to fraction form
    121,344,139.40/182,016,209.10 = 78,345,969.80/x
  3. Step 3: Cross multiply
    121,344,139.40x = 182,016,209.10 × 78,345,969.80
  4. Step 4: Simplify right side
    121,344,139.40x = 14,260,236,421,259,084
  5. Step 5: Solve for x
    x = 14,260,236,421,259,084/121,344,139.40
  6. Step 6: Final answer
    x = 117,518,954.70

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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.