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Finding the Fourth Proportional to 154,809.39, 213,638.72 and 85,900.10

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Solution

The fourth proportional to 154,809.39, 213,638.72 and 85,900.10 is: 118,543.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,809.39 : 213,638.72 = 85,900.10 : x
  2. Step 2: Convert to fraction form
    154,809.39/213,638.72 = 85,900.10/x
  3. Step 3: Cross multiply
    154,809.39x = 213,638.72 × 85,900.10
  4. Step 4: Simplify right side
    154,809.39x = 18,351,587,599.08
  5. Step 5: Solve for x
    x = 18,351,587,599.08/154,809.39
  6. Step 6: Final answer
    x = 118,543.11

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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.