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Finding the Fourth Proportional to 98,913.60, 148,168.80 and 61,358.40

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Solution

The fourth proportional to 98,913.60, 148,168.80 and 61,358.40 is: 91,912.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,913.60 : 148,168.80 = 61,358.40 : x
  2. Step 2: Convert to fraction form
    98,913.60/148,168.80 = 61,358.40/x
  3. Step 3: Cross multiply
    98,913.60x = 148,168.80 × 61,358.40
  4. Step 4: Simplify right side
    98,913.60x = 9,091,400,497.92
  5. Step 5: Solve for x
    x = 9,091,400,497.92/98,913.60
  6. Step 6: Final answer
    x = 91,912.54

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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.