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Finding the Fourth Proportional to 158,396.79, 218,587.76 and 85,799.84

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Solution

The fourth proportional to 158,396.79, 218,587.76 and 85,799.84 is: 118,403.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,396.79 : 218,587.76 = 85,799.84 : x
  2. Step 2: Convert to fraction form
    158,396.79/218,587.76 = 85,799.84/x
  3. Step 3: Cross multiply
    158,396.79x = 218,587.76 × 85,799.84
  4. Step 4: Simplify right side
    158,396.79x = 18,754,793,312.02
  5. Step 5: Solve for x
    x = 18,754,793,312.02/158,396.79
  6. Step 6: Final answer
    x = 118,403.87

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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.