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Finding the Fourth Proportional to 154,230.34, 212,821.41 and 86,240.29

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Solution

The fourth proportional to 154,230.34, 212,821.41 and 86,240.29 is: 119,002.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,230.34 : 212,821.41 = 86,240.29 : x
  2. Step 2: Convert to fraction form
    154,230.34/212,821.41 = 86,240.29/x
  3. Step 3: Cross multiply
    154,230.34x = 212,821.41 × 86,240.29
  4. Step 4: Simplify right side
    154,230.34x = 18,353,780,116.61
  5. Step 5: Solve for x
    x = 18,353,780,116.61/154,230.34
  6. Step 6: Final answer
    x = 119,002.40

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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.