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Finding the Fourth Proportional to 253,705.31, 350,113.49 and 138,988.13

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Solution

The fourth proportional to 253,705.31, 350,113.49 and 138,988.13 is: 191,803.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,705.31 : 350,113.49 = 138,988.13 : x
  2. Step 2: Convert to fraction form
    253,705.31/350,113.49 = 138,988.13/x
  3. Step 3: Cross multiply
    253,705.31x = 350,113.49 × 138,988.13
  4. Step 4: Simplify right side
    253,705.31x = 48,661,618,323.27
  5. Step 5: Solve for x
    x = 48,661,618,323.27/253,705.31
  6. Step 6: Final answer
    x = 191,803.70

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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.