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Finding the Fourth Proportional to 98,835.40, 148,034.40 and 81,339.40

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Solution

The fourth proportional to 98,835.40, 148,034.40 and 81,339.40 is: 121,829.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,835.40 : 148,034.40 = 81,339.40 : x
  2. Step 2: Convert to fraction form
    98,835.40/148,034.40 = 81,339.40/x
  3. Step 3: Cross multiply
    98,835.40x = 148,034.40 × 81,339.40
  4. Step 4: Simplify right side
    98,835.40x = 12,041,029,275.36
  5. Step 5: Solve for x
    x = 12,041,029,275.36/98,835.40
  6. Step 6: Final answer
    x = 121,829.11

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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.