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Finding the Fourth Proportional to 66,008.64, 91,055.12 and 39,125.28

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Solution

The fourth proportional to 66,008.64, 91,055.12 and 39,125.28 is: 53,971.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,008.64 : 91,055.12 = 39,125.28 : x
  2. Step 2: Convert to fraction form
    66,008.64/91,055.12 = 39,125.28/x
  3. Step 3: Cross multiply
    66,008.64x = 91,055.12 × 39,125.28
  4. Step 4: Simplify right side
    66,008.64x = 3,562,557,065.43
  5. Step 5: Solve for x
    x = 3,562,557,065.43/66,008.64
  6. Step 6: Final answer
    x = 53,971.07

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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.