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Finding the Fourth Proportional to 139,486.80, 192,313.60 and 90,341.61

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Solution

The fourth proportional to 139,486.80, 192,313.60 and 90,341.61 is: 124,556.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,486.80 : 192,313.60 = 90,341.61 : x
  2. Step 2: Convert to fraction form
    139,486.80/192,313.60 = 90,341.61/x
  3. Step 3: Cross multiply
    139,486.80x = 192,313.60 × 90,341.61
  4. Step 4: Simplify right side
    139,486.80x = 17,373,920,248.90
  5. Step 5: Solve for x
    x = 17,373,920,248.90/139,486.80
  6. Step 6: Final answer
    x = 124,556.02

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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.