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Finding the Fourth Proportional to 80,804.77, 121,041.91 and 65,865.13

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Solution

The fourth proportional to 80,804.77, 121,041.91 and 65,865.13 is: 98,663.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,804.77 : 121,041.91 = 65,865.13 : x
  2. Step 2: Convert to fraction form
    80,804.77/121,041.91 = 65,865.13/x
  3. Step 3: Cross multiply
    80,804.77x = 121,041.91 × 65,865.13
  4. Step 4: Simplify right side
    80,804.77x = 7,972,440,203.06
  5. Step 5: Solve for x
    x = 7,972,440,203.06/80,804.77
  6. Step 6: Final answer
    x = 98,663.00

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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.