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Finding the Fourth Proportional to 61,159.40, 91,739.10 and 51,317.90

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Solution

The fourth proportional to 61,159.40, 91,739.10 and 51,317.90 is: 76,976.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,159.40 : 91,739.10 = 51,317.90 : x
  2. Step 2: Convert to fraction form
    61,159.40/91,739.10 = 51,317.90/x
  3. Step 3: Cross multiply
    61,159.40x = 91,739.10 × 51,317.90
  4. Step 4: Simplify right side
    61,159.40x = 4,707,857,959.89
  5. Step 5: Solve for x
    x = 4,707,857,959.89/61,159.40
  6. Step 6: Final answer
    x = 76,976.85

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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.