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Finding the Fourth Proportional to 98,587.80, 147,881.70 and 61,190.10

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Solution

The fourth proportional to 98,587.80, 147,881.70 and 61,190.10 is: 91,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,587.80 : 147,881.70 = 61,190.10 : x
  2. Step 2: Convert to fraction form
    98,587.80/147,881.70 = 61,190.10/x
  3. Step 3: Cross multiply
    98,587.80x = 147,881.70 × 61,190.10
  4. Step 4: Simplify right side
    98,587.80x = 9,048,896,011.17
  5. Step 5: Solve for x
    x = 9,048,896,011.17/98,587.80
  6. Step 6: Final answer
    x = 91,785.15

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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.