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Finding the Fourth Proportional to 98,889.60, 148,330.80 and 39,709.20

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Solution

The fourth proportional to 98,889.60, 148,330.80 and 39,709.20 is: 59,562.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,889.60 : 148,330.80 = 39,709.20 : x
  2. Step 2: Convert to fraction form
    98,889.60/148,330.80 = 39,709.20/x
  3. Step 3: Cross multiply
    98,889.60x = 148,330.80 × 39,709.20
  4. Step 4: Simplify right side
    98,889.60x = 5,890,097,403.36
  5. Step 5: Solve for x
    x = 5,890,097,403.36/98,889.60
  6. Step 6: Final answer
    x = 59,562.35

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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.