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Finding the Fourth Proportional to 91,987, 126,942.18 and 52,243

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Solution

The fourth proportional to 91,987, 126,942.18 and 52,243 is: 72,095.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,987 : 126,942.18 = 52,243 : x
  2. Step 2: Convert to fraction form
    91,987/126,942.18 = 52,243/x
  3. Step 3: Cross multiply
    91,987x = 126,942.18 × 52,243
  4. Step 4: Simplify right side
    91,987x = 6,631,840,309.74
  5. Step 5: Solve for x
    x = 6,631,840,309.74/91,987
  6. Step 6: Final answer
    x = 72,095.41

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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.