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Finding the Fourth Proportional to 115,431, 159,384.95 and 88,530.90

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Solution

The fourth proportional to 115,431, 159,384.95 and 88,530.90 is: 122,241.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,431 : 159,384.95 = 88,530.90 : x
  2. Step 2: Convert to fraction form
    115,431/159,384.95 = 88,530.90/x
  3. Step 3: Cross multiply
    115,431x = 159,384.95 × 88,530.90
  4. Step 4: Simplify right side
    115,431x = 14,110,493,069.96
  5. Step 5: Solve for x
    x = 14,110,493,069.96/115,431
  6. Step 6: Final answer
    x = 122,241.80

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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.