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Finding the Fourth Proportional to 65,887.65, 90,887.83 and 41,681.12

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Solution

The fourth proportional to 65,887.65, 90,887.83 and 41,681.12 is: 57,496.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,887.65 : 90,887.83 = 41,681.12 : x
  2. Step 2: Convert to fraction form
    65,887.65/90,887.83 = 41,681.12/x
  3. Step 3: Cross multiply
    65,887.65x = 90,887.83 × 41,681.12
  4. Step 4: Simplify right side
    65,887.65x = 3,788,305,990.13
  5. Step 5: Solve for x
    x = 3,788,305,990.13/65,887.65
  6. Step 6: Final answer
    x = 57,496.45

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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.