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Finding the Fourth Proportional to 125,065.26, 172,741.55 and 91,019.75

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Solution

The fourth proportional to 125,065.26, 172,741.55 and 91,019.75 is: 125,717.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,065.26 : 172,741.55 = 91,019.75 : x
  2. Step 2: Convert to fraction form
    125,065.26/172,741.55 = 91,019.75/x
  3. Step 3: Cross multiply
    125,065.26x = 172,741.55 × 91,019.75
  4. Step 4: Simplify right side
    125,065.26x = 15,722,891,376.81
  5. Step 5: Solve for x
    x = 15,722,891,376.81/125,065.26
  6. Step 6: Final answer
    x = 125,717.50

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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.