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Finding the Fourth Proportional to 98,400.61, 135,746.31 and 58,087.45

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Solution

The fourth proportional to 98,400.61, 135,746.31 and 58,087.45 is: 80,133.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,400.61 : 135,746.31 = 58,087.45 : x
  2. Step 2: Convert to fraction form
    98,400.61/135,746.31 = 58,087.45/x
  3. Step 3: Cross multiply
    98,400.61x = 135,746.31 × 58,087.45
  4. Step 4: Simplify right side
    98,400.61x = 7,885,156,994.81
  5. Step 5: Solve for x
    x = 7,885,156,994.81/98,400.61
  6. Step 6: Final answer
    x = 80,133.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.