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Finding the Fourth Proportional to 112,342.40, 154,961.32 and 85,425.90

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Solution

The fourth proportional to 112,342.40, 154,961.32 and 85,425.90 is: 117,833.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,342.40 : 154,961.32 = 85,425.90 : x
  2. Step 2: Convert to fraction form
    112,342.40/154,961.32 = 85,425.90/x
  3. Step 3: Cross multiply
    112,342.40x = 154,961.32 × 85,425.90
  4. Step 4: Simplify right side
    112,342.40x = 13,237,710,226.19
  5. Step 5: Solve for x
    x = 13,237,710,226.19/112,342.40
  6. Step 6: Final answer
    x = 117,833.60

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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.