Home / 209,947,018.95-315,060,996.12-87,125,332.20

Finding the Fourth Proportional to 209,947,018.95, 315,060,996.12 and 87,125,332.20

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Solution

The fourth proportional to 209,947,018.95, 315,060,996.12 and 87,125,332.20 is: 130,746,290.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,947,018.95 : 315,060,996.12 = 87,125,332.20 : x
  2. Step 2: Convert to fraction form
    209,947,018.95/315,060,996.12 = 87,125,332.20/x
  3. Step 3: Cross multiply
    209,947,018.95x = 315,060,996.12 × 87,125,332.20
  4. Step 4: Simplify right side
    209,947,018.95x = 27,449,793,950,217,912
  5. Step 5: Solve for x
    x = 27,449,793,950,217,912/209,947,018.95
  6. Step 6: Final answer
    x = 130,746,290.60

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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.