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Finding the Fourth Proportional to 77,041.76, 115,403.45 and 45,354.20

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Solution

The fourth proportional to 77,041.76, 115,403.45 and 45,354.20 is: 67,937.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,041.76 : 115,403.45 = 45,354.20 : x
  2. Step 2: Convert to fraction form
    77,041.76/115,403.45 = 45,354.20/x
  3. Step 3: Cross multiply
    77,041.76x = 115,403.45 × 45,354.20
  4. Step 4: Simplify right side
    77,041.76x = 5,234,030,348.20
  5. Step 5: Solve for x
    x = 5,234,030,348.20/77,041.76
  6. Step 6: Final answer
    x = 67,937.58

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1.5x scale

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.