Home / 138,975.54-191,785.50-75,312.78

Finding the Fourth Proportional to 138,975.54, 191,785.50 and 75,312.78

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Solution

The fourth proportional to 138,975.54, 191,785.50 and 75,312.78 is: 103,931.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,975.54 : 191,785.50 = 75,312.78 : x
  2. Step 2: Convert to fraction form
    138,975.54/191,785.50 = 75,312.78/x
  3. Step 3: Cross multiply
    138,975.54x = 191,785.50 × 75,312.78
  4. Step 4: Simplify right side
    138,975.54x = 14,443,899,168.69
  5. Step 5: Solve for x
    x = 14,443,899,168.69/138,975.54
  6. Step 6: Final answer
    x = 103,931.23

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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.