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Finding the Fourth Proportional to 98,605.80, 147,908.70 and 61,208.10

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Solution

The fourth proportional to 98,605.80, 147,908.70 and 61,208.10 is: 91,812.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,605.80 : 147,908.70 = 61,208.10 : x
  2. Step 2: Convert to fraction form
    98,605.80/147,908.70 = 61,208.10/x
  3. Step 3: Cross multiply
    98,605.80x = 147,908.70 × 61,208.10
  4. Step 4: Simplify right side
    98,605.80x = 9,053,210,500.47
  5. Step 5: Solve for x
    x = 9,053,210,500.47/98,605.80
  6. Step 6: Final answer
    x = 91,812.15

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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.