Home / 86,516,551.20-129,774,826.80-79,947,386.40

Finding the Fourth Proportional to 86,516,551.20, 129,774,826.80 and 79,947,386.40

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Solution

The fourth proportional to 86,516,551.20, 129,774,826.80 and 79,947,386.40 is: 119,921,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,516,551.20 : 129,774,826.80 = 79,947,386.40 : x
  2. Step 2: Convert to fraction form
    86,516,551.20/129,774,826.80 = 79,947,386.40/x
  3. Step 3: Cross multiply
    86,516,551.20x = 129,774,826.80 × 79,947,386.40
  4. Step 4: Simplify right side
    86,516,551.20x = 10,375,158,223,172,676
  5. Step 5: Solve for x
    x = 10,375,158,223,172,676/86,516,551.20
  6. Step 6: Final answer
    x = 119,921,079.60

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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.