Home / 208,367,447.20-312,663,145.20-87,211,146.40

Finding the Fourth Proportional to 208,367,447.20, 312,663,145.20 and 87,211,146.40

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Solution

The fourth proportional to 208,367,447.20, 312,663,145.20 and 87,211,146.40 is: 130,863,585.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,367,447.20 : 312,663,145.20 = 87,211,146.40 : x
  2. Step 2: Convert to fraction form
    208,367,447.20/312,663,145.20 = 87,211,146.40/x
  3. Step 3: Cross multiply
    208,367,447.20x = 312,663,145.20 × 87,211,146.40
  4. Step 4: Simplify right side
    208,367,447.20x = 27,267,711,329,921,660
  5. Step 5: Solve for x
    x = 27,267,711,329,921,660/208,367,447.20
  6. Step 6: Final answer
    x = 130,863,585.92

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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.