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Finding the Fourth Proportional to 71,671.68, 98,913.60 and 43,384.32

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Solution

The fourth proportional to 71,671.68, 98,913.60 and 43,384.32 is: 59,874.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,671.68 : 98,913.60 = 43,384.32 : x
  2. Step 2: Convert to fraction form
    71,671.68/98,913.60 = 43,384.32/x
  3. Step 3: Cross multiply
    71,671.68x = 98,913.60 × 43,384.32
  4. Step 4: Simplify right side
    71,671.68x = 4,291,299,274.75
  5. Step 5: Solve for x
    x = 4,291,299,274.75/71,671.68
  6. Step 6: Final answer
    x = 59,874.41

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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.