Home / 138,450.47-191,061.75-74,788.28

Finding the Fourth Proportional to 138,450.47, 191,061.75 and 74,788.28

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Solution

The fourth proportional to 138,450.47, 191,061.75 and 74,788.28 is: 103,207.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,450.47 : 191,061.75 = 74,788.28 : x
  2. Step 2: Convert to fraction form
    138,450.47/191,061.75 = 74,788.28/x
  3. Step 3: Cross multiply
    138,450.47x = 191,061.75 × 74,788.28
  4. Step 4: Simplify right side
    138,450.47x = 14,289,178,700.98
  5. Step 5: Solve for x
    x = 14,289,178,700.98/138,450.47
  6. Step 6: Final answer
    x = 103,207.88

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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.