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Finding the Fourth Proportional to 218,737.55, 328,133.70 and 85,600.62

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Solution

The fourth proportional to 218,737.55, 328,133.70 and 85,600.62 is: 128,411.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,737.55 : 328,133.70 = 85,600.62 : x
  2. Step 2: Convert to fraction form
    218,737.55/328,133.70 = 85,600.62/x
  3. Step 3: Cross multiply
    218,737.55x = 328,133.70 × 85,600.62
  4. Step 4: Simplify right side
    218,737.55x = 28,088,448,162.89
  5. Step 5: Solve for x
    x = 28,088,448,162.89/218,737.55
  6. Step 6: Final answer
    x = 128,411.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.