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Finding the Fourth Proportional to 98,940.60, 148,209.30 and 61,385.40

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Solution

The fourth proportional to 98,940.60, 148,209.30 and 61,385.40 is: 91,953.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,940.60 : 148,209.30 = 61,385.40 : x
  2. Step 2: Convert to fraction form
    98,940.60/148,209.30 = 61,385.40/x
  3. Step 3: Cross multiply
    98,940.60x = 148,209.30 × 61,385.40
  4. Step 4: Simplify right side
    98,940.60x = 9,097,887,164.22
  5. Step 5: Solve for x
    x = 9,097,887,164.22/98,940.60
  6. Step 6: Final answer
    x = 91,953.02

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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.