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Finding the Fourth Proportional to 144,647.68, 216,805.12 and 90,636.80

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Solution

The fourth proportional to 144,647.68, 216,805.12 and 90,636.80 is: 135,850.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,647.68 : 216,805.12 = 90,636.80 : x
  2. Step 2: Convert to fraction form
    144,647.68/216,805.12 = 90,636.80/x
  3. Step 3: Cross multiply
    144,647.68x = 216,805.12 × 90,636.80
  4. Step 4: Simplify right side
    144,647.68x = 19,650,522,300.42
  5. Step 5: Solve for x
    x = 19,650,522,300.42/144,647.68
  6. Step 6: Final answer
    x = 135,850.93

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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.