Home / 257,790.80-386,686.20-80,312.11

Finding the Fourth Proportional to 257,790.80, 386,686.20 and 80,312.11

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Solution

The fourth proportional to 257,790.80, 386,686.20 and 80,312.11 is: 120,468.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,790.80 : 386,686.20 = 80,312.11 : x
  2. Step 2: Convert to fraction form
    257,790.80/386,686.20 = 80,312.11/x
  3. Step 3: Cross multiply
    257,790.80x = 386,686.20 × 80,312.11
  4. Step 4: Simplify right side
    257,790.80x = 31,055,583,964.34
  5. Step 5: Solve for x
    x = 31,055,583,964.34/257,790.80
  6. Step 6: Final answer
    x = 120,468.16

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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.