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Finding the Fourth Proportional to 65,896.90, 90,931.94 and 39,034.87

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Solution

The fourth proportional to 65,896.90, 90,931.94 and 39,034.87 is: 53,864.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,896.90 : 90,931.94 = 39,034.87 : x
  2. Step 2: Convert to fraction form
    65,896.90/90,931.94 = 39,034.87/x
  3. Step 3: Cross multiply
    65,896.90x = 90,931.94 × 39,034.87
  4. Step 4: Simplify right side
    65,896.90x = 3,549,516,261.57
  5. Step 5: Solve for x
    x = 3,549,516,261.57/65,896.90
  6. Step 6: Final answer
    x = 53,864.69

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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.