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Finding the Fourth Proportional to 157,015.92, 216,679.88 and 85,394.40

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Solution

The fourth proportional to 157,015.92, 216,679.88 and 85,394.40 is: 117,843.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,015.92 : 216,679.88 = 85,394.40 : x
  2. Step 2: Convert to fraction form
    157,015.92/216,679.88 = 85,394.40/x
  3. Step 3: Cross multiply
    157,015.92x = 216,679.88 × 85,394.40
  4. Step 4: Simplify right side
    157,015.92x = 18,503,248,344.67
  5. Step 5: Solve for x
    x = 18,503,248,344.67/157,015.92
  6. Step 6: Final answer
    x = 117,843.14

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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.