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Finding the Fourth Proportional to 70,874.64, 97,803.36 and 39,042.72

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Solution

The fourth proportional to 70,874.64, 97,803.36 and 39,042.72 is: 53,876.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,874.64 : 97,803.36 = 39,042.72 : x
  2. Step 2: Convert to fraction form
    70,874.64/97,803.36 = 39,042.72/x
  3. Step 3: Cross multiply
    70,874.64x = 97,803.36 × 39,042.72
  4. Step 4: Simplify right side
    70,874.64x = 3,818,509,199.54
  5. Step 5: Solve for x
    x = 3,818,509,199.54/70,874.64
  6. Step 6: Final answer
    x = 53,876.95

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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.