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Finding the Fourth Proportional to 98,940.94, 136,569.50 and 63,130.88

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Solution

The fourth proportional to 98,940.94, 136,569.50 and 63,130.88 is: 87,140.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,940.94 : 136,569.50 = 63,130.88 : x
  2. Step 2: Convert to fraction form
    98,940.94/136,569.50 = 63,130.88/x
  3. Step 3: Cross multiply
    98,940.94x = 136,569.50 × 63,130.88
  4. Step 4: Simplify right side
    98,940.94x = 8,621,752,716.16
  5. Step 5: Solve for x
    x = 8,621,752,716.16/98,940.94
  6. Step 6: Final answer
    x = 87,140.40

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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.