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Finding the Fourth Proportional to 98,705.20, 148,079.40 and 48,809.20

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Solution

The fourth proportional to 98,705.20, 148,079.40 and 48,809.20 is: 73,224.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,705.20 : 148,079.40 = 48,809.20 : x
  2. Step 2: Convert to fraction form
    98,705.20/148,079.40 = 48,809.20/x
  3. Step 3: Cross multiply
    98,705.20x = 148,079.40 × 48,809.20
  4. Step 4: Simplify right side
    98,705.20x = 7,227,637,050.48
  5. Step 5: Solve for x
    x = 7,227,637,050.48/98,705.20
  6. Step 6: Final answer
    x = 73,224.48

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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.