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Finding the Fourth Proportional to 98,746.20, 147,989.70 and 87,600.60

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Solution

The fourth proportional to 98,746.20, 147,989.70 and 87,600.60 is: 131,285.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,746.20 : 147,989.70 = 87,600.60 : x
  2. Step 2: Convert to fraction form
    98,746.20/147,989.70 = 87,600.60/x
  3. Step 3: Cross multiply
    98,746.20x = 147,989.70 × 87,600.60
  4. Step 4: Simplify right side
    98,746.20x = 12,963,986,513.82
  5. Step 5: Solve for x
    x = 12,963,986,513.82/98,746.20
  6. Step 6: Final answer
    x = 131,285.93

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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.