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Finding the Fourth Proportional to 128,045.70, 191,809.35 and 88,647.30

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Solution

The fourth proportional to 128,045.70, 191,809.35 and 88,647.30 is: 132,791.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,045.70 : 191,809.35 = 88,647.30 : x
  2. Step 2: Convert to fraction form
    128,045.70/191,809.35 = 88,647.30/x
  3. Step 3: Cross multiply
    128,045.70x = 191,809.35 × 88,647.30
  4. Step 4: Simplify right side
    128,045.70x = 17,003,380,992.26
  5. Step 5: Solve for x
    x = 17,003,380,992.26/128,045.70
  6. Step 6: Final answer
    x = 132,791.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.