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Finding the Fourth Proportional to 65,230.38, 90,005.58 and 61,908.57

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Solution

The fourth proportional to 65,230.38, 90,005.58 and 61,908.57 is: 85,422.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,230.38 : 90,005.58 = 61,908.57 : x
  2. Step 2: Convert to fraction form
    65,230.38/90,005.58 = 61,908.57/x
  3. Step 3: Cross multiply
    65,230.38x = 90,005.58 × 61,908.57
  4. Step 4: Simplify right side
    65,230.38x = 5,572,116,749.82
  5. Step 5: Solve for x
    x = 5,572,116,749.82/65,230.38
  6. Step 6: Final answer
    x = 85,422.11

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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.