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Finding the Fourth Proportional to 90,405.64, 124,758.12 and 49,569.76

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Solution

The fourth proportional to 90,405.64, 124,758.12 and 49,569.76 is: 68,405.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,405.64 : 124,758.12 = 49,569.76 : x
  2. Step 2: Convert to fraction form
    90,405.64/124,758.12 = 49,569.76/x
  3. Step 3: Cross multiply
    90,405.64x = 124,758.12 × 49,569.76
  4. Step 4: Simplify right side
    90,405.64x = 6,184,230,066.45
  5. Step 5: Solve for x
    x = 6,184,230,066.45/90,405.64
  6. Step 6: Final answer
    x = 68,405.36

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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.