Home / 86,689,665.80-130,034,498.70-78,753,480.20

Finding the Fourth Proportional to 86,689,665.80, 130,034,498.70 and 78,753,480.20

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Solution

The fourth proportional to 86,689,665.80, 130,034,498.70 and 78,753,480.20 is: 118,130,220.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,689,665.80 : 130,034,498.70 = 78,753,480.20 : x
  2. Step 2: Convert to fraction form
    86,689,665.80/130,034,498.70 = 78,753,480.20/x
  3. Step 3: Cross multiply
    86,689,665.80x = 130,034,498.70 × 78,753,480.20
  4. Step 4: Simplify right side
    86,689,665.80x = 10,240,669,318,687,376
  5. Step 5: Solve for x
    x = 10,240,669,318,687,376/86,689,665.80
  6. Step 6: Final answer
    x = 118,130,220.30

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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.