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Finding the Fourth Proportional to 66,959.28, 92,412 and 38,664.92

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Solution

The fourth proportional to 66,959.28, 92,412 and 38,664.92 is: 53,362.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,959.28 : 92,412 = 38,664.92 : x
  2. Step 2: Convert to fraction form
    66,959.28/92,412 = 38,664.92/x
  3. Step 3: Cross multiply
    66,959.28x = 92,412 × 38,664.92
  4. Step 4: Simplify right side
    66,959.28x = 3,573,102,587.04
  5. Step 5: Solve for x
    x = 3,573,102,587.04/66,959.28
  6. Step 6: Final answer
    x = 53,362.32

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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.