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Finding the Fourth Proportional to 72,344.40, 99,791.10 and 47,815.17

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Solution

The fourth proportional to 72,344.40, 99,791.10 and 47,815.17 is: 65,955.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,344.40 : 99,791.10 = 47,815.17 : x
  2. Step 2: Convert to fraction form
    72,344.40/99,791.10 = 47,815.17/x
  3. Step 3: Cross multiply
    72,344.40x = 99,791.10 × 47,815.17
  4. Step 4: Simplify right side
    72,344.40x = 4,771,528,410.99
  5. Step 5: Solve for x
    x = 4,771,528,410.99/72,344.40
  6. Step 6: Final answer
    x = 65,955.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.