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Finding the Fourth Proportional to 78,992.67, 109,010.61 and 45,000.66

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Solution

The fourth proportional to 78,992.67, 109,010.61 and 45,000.66 is: 62,101.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,992.67 : 109,010.61 = 45,000.66 : x
  2. Step 2: Convert to fraction form
    78,992.67/109,010.61 = 45,000.66/x
  3. Step 3: Cross multiply
    78,992.67x = 109,010.61 × 45,000.66
  4. Step 4: Simplify right side
    78,992.67x = 4,905,549,397.00
  5. Step 5: Solve for x
    x = 4,905,549,397.00/78,992.67
  6. Step 6: Final answer
    x = 62,101.32

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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.