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Finding the Fourth Proportional to 115,038.71, 158,729.01 and 72,572.63

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Solution

The fourth proportional to 115,038.71, 158,729.01 and 72,572.63 is: 100,134.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,038.71 : 158,729.01 = 72,572.63 : x
  2. Step 2: Convert to fraction form
    115,038.71/158,729.01 = 72,572.63/x
  3. Step 3: Cross multiply
    115,038.71x = 158,729.01 × 72,572.63
  4. Step 4: Simplify right side
    115,038.71x = 11,519,380,919.35
  5. Step 5: Solve for x
    x = 11,519,380,919.35/115,038.71
  6. Step 6: Final answer
    x = 100,134.83

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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.