Home / 138,352.56-207,721.80-70,931.76

Finding the Fourth Proportional to 138,352.56, 207,721.80 and 70,931.76

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Solution

The fourth proportional to 138,352.56, 207,721.80 and 70,931.76 is: 106,496.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,352.56 : 207,721.80 = 70,931.76 : x
  2. Step 2: Convert to fraction form
    138,352.56/207,721.80 = 70,931.76/x
  3. Step 3: Cross multiply
    138,352.56x = 207,721.80 × 70,931.76
  4. Step 4: Simplify right side
    138,352.56x = 14,734,072,864.37
  5. Step 5: Solve for x
    x = 14,734,072,864.37/138,352.56
  6. Step 6: Final answer
    x = 106,496.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.