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Finding the Fourth Proportional to 115,000.61, 158,650.98 and 81,003.70

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Solution

The fourth proportional to 115,000.61, 158,650.98 and 81,003.70 is: 111,749.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,000.61 : 158,650.98 = 81,003.70 : x
  2. Step 2: Convert to fraction form
    115,000.61/158,650.98 = 81,003.70/x
  3. Step 3: Cross multiply
    115,000.61x = 158,650.98 × 81,003.70
  4. Step 4: Simplify right side
    115,000.61x = 12,851,315,618.59
  5. Step 5: Solve for x
    x = 12,851,315,618.59/115,000.61
  6. Step 6: Final answer
    x = 111,749.98

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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.