Home / 155,952,890.88-215,206,806.40-85,374,970.72

Finding the Fourth Proportional to 155,952,890.88, 215,206,806.40 and 85,374,970.72

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Solution

The fourth proportional to 155,952,890.88, 215,206,806.40 and 85,374,970.72 is: 117,812,979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,952,890.88 : 215,206,806.40 = 85,374,970.72 : x
  2. Step 2: Convert to fraction form
    155,952,890.88/215,206,806.40 = 85,374,970.72/x
  3. Step 3: Cross multiply
    155,952,890.88x = 215,206,806.40 × 85,374,970.72
  4. Step 4: Simplify right side
    155,952,890.88x = 18,373,274,795,144,708
  5. Step 5: Solve for x
    x = 18,373,274,795,144,708/155,952,890.88
  6. Step 6: Final answer
    x = 117,812,979.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.