Home / 257,561.10-386,370.45-80,066.70

Finding the Fourth Proportional to 257,561.10, 386,370.45 and 80,066.70

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Solution

The fourth proportional to 257,561.10, 386,370.45 and 80,066.70 is: 120,109.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,561.10 : 386,370.45 = 80,066.70 : x
  2. Step 2: Convert to fraction form
    257,561.10/386,370.45 = 80,066.70/x
  3. Step 3: Cross multiply
    257,561.10x = 386,370.45 × 80,066.70
  4. Step 4: Simplify right side
    257,561.10x = 30,935,406,909.02
  5. Step 5: Solve for x
    x = 30,935,406,909.02/257,561.10
  6. Step 6: Final answer
    x = 120,109.00

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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.