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Finding the Fourth Proportional to 66,117.87, 91,242.86 and 39,261.51

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Solution

The fourth proportional to 66,117.87, 91,242.86 and 39,261.51 is: 54,181.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,117.87 : 91,242.86 = 39,261.51 : x
  2. Step 2: Convert to fraction form
    66,117.87/91,242.86 = 39,261.51/x
  3. Step 3: Cross multiply
    66,117.87x = 91,242.86 × 39,261.51
  4. Step 4: Simplify right side
    66,117.87x = 3,582,332,264.01
  5. Step 5: Solve for x
    x = 3,582,332,264.01/66,117.87
  6. Step 6: Final answer
    x = 54,181.00

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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.