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Finding the Fourth Proportional to 91,570.14, 137,979.16 and 75,294.75

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Solution

The fourth proportional to 91,570.14, 137,979.16 and 75,294.75 is: 113,455.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,570.14 : 137,979.16 = 75,294.75 : x
  2. Step 2: Convert to fraction form
    91,570.14/137,979.16 = 75,294.75/x
  3. Step 3: Cross multiply
    91,570.14x = 137,979.16 × 75,294.75
  4. Step 4: Simplify right side
    91,570.14x = 10,389,106,357.41
  5. Step 5: Solve for x
    x = 10,389,106,357.41/91,570.14
  6. Step 6: Final answer
    x = 113,455.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.