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Finding the Fourth Proportional to 77,295.80, 115,943.70 and 47,617.40

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Solution

The fourth proportional to 77,295.80, 115,943.70 and 47,617.40 is: 71,426.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,295.80 : 115,943.70 = 47,617.40 : x
  2. Step 2: Convert to fraction form
    77,295.80/115,943.70 = 47,617.40/x
  3. Step 3: Cross multiply
    77,295.80x = 115,943.70 × 47,617.40
  4. Step 4: Simplify right side
    77,295.80x = 5,520,937,540.38
  5. Step 5: Solve for x
    x = 5,520,937,540.38/77,295.80
  6. Step 6: Final answer
    x = 71,426.10

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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.