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Finding the Fourth Proportional to 131,314.42, 181,212.78 and 74,728.90

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Solution

The fourth proportional to 131,314.42, 181,212.78 and 74,728.90 is: 103,125.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,314.42 : 181,212.78 = 74,728.90 : x
  2. Step 2: Convert to fraction form
    131,314.42/181,212.78 = 74,728.90/x
  3. Step 3: Cross multiply
    131,314.42x = 181,212.78 × 74,728.90
  4. Step 4: Simplify right side
    131,314.42x = 13,541,831,715.34
  5. Step 5: Solve for x
    x = 13,541,831,715.34/131,314.42
  6. Step 6: Final answer
    x = 103,125.24

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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.