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Finding the Fourth Proportional to 231,674.74, 319,706.64 and 129,700.40

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Solution

The fourth proportional to 231,674.74, 319,706.64 and 129,700.40 is: 178,984.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    231,674.74 : 319,706.64 = 129,700.40 : x
  2. Step 2: Convert to fraction form
    231,674.74/319,706.64 = 129,700.40/x
  3. Step 3: Cross multiply
    231,674.74x = 319,706.64 × 129,700.40
  4. Step 4: Simplify right side
    231,674.74x = 41,466,079,090.66
  5. Step 5: Solve for x
    x = 41,466,079,090.66/231,674.74
  6. Step 6: Final answer
    x = 178,984.03

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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.