Home / 138,704.61-191,430.55-102,996.57

Finding the Fourth Proportional to 138,704.61, 191,430.55 and 102,996.57

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Solution

The fourth proportional to 138,704.61, 191,430.55 and 102,996.57 is: 142,148.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,704.61 : 191,430.55 = 102,996.57 : x
  2. Step 2: Convert to fraction form
    138,704.61/191,430.55 = 102,996.57/x
  3. Step 3: Cross multiply
    138,704.61x = 191,430.55 × 102,996.57
  4. Step 4: Simplify right side
    138,704.61x = 19,716,690,043.21
  5. Step 5: Solve for x
    x = 19,716,690,043.21/138,704.61
  6. Step 6: Final answer
    x = 142,148.77

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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.