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Finding the Fourth Proportional to 156,805.95, 216,410.76 and 93,144

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Solution

The fourth proportional to 156,805.95, 216,410.76 and 93,144 is: 128,549.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,805.95 : 216,410.76 = 93,144 : x
  2. Step 2: Convert to fraction form
    156,805.95/216,410.76 = 93,144/x
  3. Step 3: Cross multiply
    156,805.95x = 216,410.76 × 93,144
  4. Step 4: Simplify right side
    156,805.95x = 20,157,363,829.44
  5. Step 5: Solve for x
    x = 20,157,363,829.44/156,805.95
  6. Step 6: Final answer
    x = 128,549.74

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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.