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Finding the Fourth Proportional to 123,927.15, 171,019.64 and 70,215.80

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Solution

The fourth proportional to 123,927.15, 171,019.64 and 70,215.80 is: 96,897.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,927.15 : 171,019.64 = 70,215.80 : x
  2. Step 2: Convert to fraction form
    123,927.15/171,019.64 = 70,215.80/x
  3. Step 3: Cross multiply
    123,927.15x = 171,019.64 × 70,215.80
  4. Step 4: Simplify right side
    123,927.15x = 12,008,280,781.50
  5. Step 5: Solve for x
    x = 12,008,280,781.50/123,927.15
  6. Step 6: Final answer
    x = 96,897.90

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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.