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Finding the Fourth Proportional to 138,469.70, 191,088.36 and 74,807.50

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Solution

The fourth proportional to 138,469.70, 191,088.36 and 74,807.50 is: 103,234.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,469.70 : 191,088.36 = 74,807.50 : x
  2. Step 2: Convert to fraction form
    138,469.70/191,088.36 = 74,807.50/x
  3. Step 3: Cross multiply
    138,469.70x = 191,088.36 × 74,807.50
  4. Step 4: Simplify right side
    138,469.70x = 14,294,842,490.70
  5. Step 5: Solve for x
    x = 14,294,842,490.70/138,469.70
  6. Step 6: Final answer
    x = 103,234.44

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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.