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Finding the Fourth Proportional to 138,423.30, 194,317.50 and 138,423.30

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Solution

The fourth proportional to 138,423.30, 194,317.50 and 138,423.30 is: 194,317.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,423.30 : 194,317.50 = 138,423.30 : x
  2. Step 2: Convert to fraction form
    138,423.30/194,317.50 = 138,423.30/x
  3. Step 3: Cross multiply
    138,423.30x = 194,317.50 × 138,423.30
  4. Step 4: Simplify right side
    138,423.30x = 26,898,069,597.75
  5. Step 5: Solve for x
    x = 26,898,069,597.75/138,423.30
  6. Step 6: Final answer
    x = 194,317.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.