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Finding the Fourth Proportional to 98,785.79, 136,233.83 and 66,023

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Solution

The fourth proportional to 98,785.79, 136,233.83 and 66,023 is: 91,051.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,785.79 : 136,233.83 = 66,023 : x
  2. Step 2: Convert to fraction form
    98,785.79/136,233.83 = 66,023/x
  3. Step 3: Cross multiply
    98,785.79x = 136,233.83 × 66,023
  4. Step 4: Simplify right side
    98,785.79x = 8,994,565,827.98
  5. Step 5: Solve for x
    x = 8,994,565,827.98/98,785.79
  6. Step 6: Final answer
    x = 91,051.21

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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.