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Finding the Fourth Proportional to 98,588.80, 147,980.40 and 48,725.20

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Solution

The fourth proportional to 98,588.80, 147,980.40 and 48,725.20 is: 73,135.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,588.80 : 147,980.40 = 48,725.20 : x
  2. Step 2: Convert to fraction form
    98,588.80/147,980.40 = 48,725.20/x
  3. Step 3: Cross multiply
    98,588.80x = 147,980.40 × 48,725.20
  4. Step 4: Simplify right side
    98,588.80x = 7,210,374,586.08
  5. Step 5: Solve for x
    x = 7,210,374,586.08/98,588.80
  6. Step 6: Final answer
    x = 73,135.84

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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.