Home / 208,015,729.60-312,060,919.20-86,859,428.80

Finding the Fourth Proportional to 208,015,729.60, 312,060,919.20 and 86,859,428.80

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Solution

The fourth proportional to 208,015,729.60, 312,060,919.20 and 86,859,428.80 is: 130,304,728.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,015,729.60 : 312,060,919.20 = 86,859,428.80 : x
  2. Step 2: Convert to fraction form
    208,015,729.60/312,060,919.20 = 86,859,428.80/x
  3. Step 3: Cross multiply
    208,015,729.60x = 312,060,919.20 × 86,859,428.80
  4. Step 4: Simplify right side
    208,015,729.60x = 27,105,433,192,514,952
  5. Step 5: Solve for x
    x = 27,105,433,192,514,952/208,015,729.60
  6. Step 6: Final answer
    x = 130,304,728.61

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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.