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Finding the Fourth Proportional to 98,798.94, 136,305.32 and 64,826.18

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Solution

The fourth proportional to 98,798.94, 136,305.32 and 64,826.18 is: 89,435.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,798.94 : 136,305.32 = 64,826.18 : x
  2. Step 2: Convert to fraction form
    98,798.94/136,305.32 = 64,826.18/x
  3. Step 3: Cross multiply
    98,798.94x = 136,305.32 × 64,826.18
  4. Step 4: Simplify right side
    98,798.94x = 8,836,153,209.28
  5. Step 5: Solve for x
    x = 8,836,153,209.28/98,798.94
  6. Step 6: Final answer
    x = 89,435.71

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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.