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Finding the Fourth Proportional to 159,859.20, 220,611.04 and 87,266.40

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Solution

The fourth proportional to 159,859.20, 220,611.04 and 87,266.40 is: 120,430.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,859.20 : 220,611.04 = 87,266.40 : x
  2. Step 2: Convert to fraction form
    159,859.20/220,611.04 = 87,266.40/x
  3. Step 3: Cross multiply
    159,859.20x = 220,611.04 × 87,266.40
  4. Step 4: Simplify right side
    159,859.20x = 19,251,931,261.06
  5. Step 5: Solve for x
    x = 19,251,931,261.06/159,859.20
  6. Step 6: Final answer
    x = 120,430.55

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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.