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Finding the Fourth Proportional to 144,616.80, 216,487.80 and 128,870.40

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Solution

The fourth proportional to 144,616.80, 216,487.80 and 128,870.40 is: 192,915.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,616.80 : 216,487.80 = 128,870.40 : x
  2. Step 2: Convert to fraction form
    144,616.80/216,487.80 = 128,870.40/x
  3. Step 3: Cross multiply
    144,616.80x = 216,487.80 × 128,870.40
  4. Step 4: Simplify right side
    144,616.80x = 27,898,869,381.12
  5. Step 5: Solve for x
    x = 27,898,869,381.12/144,616.80
  6. Step 6: Final answer
    x = 192,915.83

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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.