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Finding the Fourth Proportional to 155,792.70, 215,004.06 and 90,394.92

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Solution

The fourth proportional to 155,792.70, 215,004.06 and 90,394.92 is: 124,750.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,792.70 : 215,004.06 = 90,394.92 : x
  2. Step 2: Convert to fraction form
    155,792.70/215,004.06 = 90,394.92/x
  3. Step 3: Cross multiply
    155,792.70x = 215,004.06 × 90,394.92
  4. Step 4: Simplify right side
    155,792.70x = 19,435,274,803.38
  5. Step 5: Solve for x
    x = 19,435,274,803.38/155,792.70
  6. Step 6: Final answer
    x = 124,750.87

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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.