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Finding the Fourth Proportional to 123,370.96, 170,254.20 and 72,420.16

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Solution

The fourth proportional to 123,370.96, 170,254.20 and 72,420.16 is: 99,941.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,370.96 : 170,254.20 = 72,420.16 : x
  2. Step 2: Convert to fraction form
    123,370.96/170,254.20 = 72,420.16/x
  3. Step 3: Cross multiply
    123,370.96x = 170,254.20 × 72,420.16
  4. Step 4: Simplify right side
    123,370.96x = 12,329,836,404.67
  5. Step 5: Solve for x
    x = 12,329,836,404.67/123,370.96
  6. Step 6: Final answer
    x = 99,941.16

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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.