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Finding the Fourth Proportional to 98,690.64, 136,184.28 and 55,673.28

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Solution

The fourth proportional to 98,690.64, 136,184.28 and 55,673.28 is: 76,824.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,690.64 : 136,184.28 = 55,673.28 : x
  2. Step 2: Convert to fraction form
    98,690.64/136,184.28 = 55,673.28/x
  3. Step 3: Cross multiply
    98,690.64x = 136,184.28 × 55,673.28
  4. Step 4: Simplify right side
    98,690.64x = 7,581,825,552.04
  5. Step 5: Solve for x
    x = 7,581,825,552.04/98,690.64
  6. Step 6: Final answer
    x = 76,824.16

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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.