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Finding the Fourth Proportional to 85,585.71, 127,751.51 and 75,485.57

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Solution

The fourth proportional to 85,585.71, 127,751.51 and 75,485.57 is: 112,675.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,585.71 : 127,751.51 = 75,485.57 : x
  2. Step 2: Convert to fraction form
    85,585.71/127,751.51 = 75,485.57/x
  3. Step 3: Cross multiply
    85,585.71x = 127,751.51 × 75,485.57
  4. Step 4: Simplify right side
    85,585.71x = 9,643,394,534.53
  5. Step 5: Solve for x
    x = 9,643,394,534.53/85,585.71
  6. Step 6: Final answer
    x = 112,675.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.