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Finding the Fourth Proportional to 115,290.30, 159,174.72 and 72,328.74

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Solution

The fourth proportional to 115,290.30, 159,174.72 and 72,328.74 is: 99,860.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,290.30 : 159,174.72 = 72,328.74 : x
  2. Step 2: Convert to fraction form
    115,290.30/159,174.72 = 72,328.74/x
  3. Step 3: Cross multiply
    115,290.30x = 159,174.72 × 72,328.74
  4. Step 4: Simplify right side
    115,290.30x = 11,512,906,937.45
  5. Step 5: Solve for x
    x = 11,512,906,937.45/115,290.30
  6. Step 6: Final answer
    x = 99,860.15

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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.