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Finding the Fourth Proportional to 231,043.64, 318,808.76 and 129,056.13

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Solution

The fourth proportional to 231,043.64, 318,808.76 and 129,056.13 is: 178,079.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,043.64 : 318,808.76 = 129,056.13 : x
  2. Step 2: Convert to fraction form
    231,043.64/318,808.76 = 129,056.13/x
  3. Step 3: Cross multiply
    231,043.64x = 318,808.76 × 129,056.13
  4. Step 4: Simplify right side
    231,043.64x = 41,144,224,130.42
  5. Step 5: Solve for x
    x = 41,144,224,130.42/231,043.64
  6. Step 6: Final answer
    x = 178,079.89

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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.