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Finding the Fourth Proportional to 144,235.38, 216,401.13 and 90,865.74

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Solution

The fourth proportional to 144,235.38, 216,401.13 and 90,865.74 is: 136,328.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,235.38 : 216,401.13 = 90,865.74 : x
  2. Step 2: Convert to fraction form
    144,235.38/216,401.13 = 90,865.74/x
  3. Step 3: Cross multiply
    144,235.38x = 216,401.13 × 90,865.74
  4. Step 4: Simplify right side
    144,235.38x = 19,663,448,359.96
  5. Step 5: Solve for x
    x = 19,663,448,359.96/144,235.38
  6. Step 6: Final answer
    x = 136,328.89

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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.