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Finding the Fourth Proportional to 91,065.47, 125,670.35 and 53,339.72

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Solution

The fourth proportional to 91,065.47, 125,670.35 and 53,339.72 is: 73,608.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,065.47 : 125,670.35 = 53,339.72 : x
  2. Step 2: Convert to fraction form
    91,065.47/125,670.35 = 53,339.72/x
  3. Step 3: Cross multiply
    91,065.47x = 125,670.35 × 53,339.72
  4. Step 4: Simplify right side
    91,065.47x = 6,703,221,057.54
  5. Step 5: Solve for x
    x = 6,703,221,057.54/91,065.47
  6. Step 6: Final answer
    x = 73,608.81

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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.