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Finding the Fourth Proportional to 122,387.10, 168,895.59 and 71,398.14

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Solution

The fourth proportional to 122,387.10, 168,895.59 and 71,398.14 is: 98,530.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,387.10 : 168,895.59 = 71,398.14 : x
  2. Step 2: Convert to fraction form
    122,387.10/168,895.59 = 71,398.14/x
  3. Step 3: Cross multiply
    122,387.10x = 168,895.59 × 71,398.14
  4. Step 4: Simplify right side
    122,387.10x = 12,058,830,980.20
  5. Step 5: Solve for x
    x = 12,058,830,980.20/122,387.10
  6. Step 6: Final answer
    x = 98,530.25

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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.