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Finding the Fourth Proportional to 158,256.88, 218,394.12 and 86,636.88

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Solution

The fourth proportional to 158,256.88, 218,394.12 and 86,636.88 is: 119,558.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,256.88 : 218,394.12 = 86,636.88 : x
  2. Step 2: Convert to fraction form
    158,256.88/218,394.12 = 86,636.88/x
  3. Step 3: Cross multiply
    158,256.88x = 218,394.12 × 86,636.88
  4. Step 4: Simplify right side
    158,256.88x = 18,920,985,167.15
  5. Step 5: Solve for x
    x = 18,920,985,167.15/158,256.88
  6. Step 6: Final answer
    x = 119,558.69

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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.