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Finding the Fourth Proportional to 98,805.46, 148,215.70 and 38,805

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Solution

The fourth proportional to 98,805.46, 148,215.70 and 38,805 is: 58,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,805.46 : 148,215.70 = 38,805 : x
  2. Step 2: Convert to fraction form
    98,805.46/148,215.70 = 38,805/x
  3. Step 3: Cross multiply
    98,805.46x = 148,215.70 × 38,805
  4. Step 4: Simplify right side
    98,805.46x = 5,751,510,238.50
  5. Step 5: Solve for x
    x = 5,751,510,238.50/98,805.46
  6. Step 6: Final answer
    x = 58,210.45

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1.5x scale

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.