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Finding the Fourth Proportional to 98,607.76, 136,078.70 and 53,895.76

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Solution

The fourth proportional to 98,607.76, 136,078.70 and 53,895.76 is: 74,376.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,607.76 : 136,078.70 = 53,895.76 : x
  2. Step 2: Convert to fraction form
    98,607.76/136,078.70 = 53,895.76/x
  3. Step 3: Cross multiply
    98,607.76x = 136,078.70 × 53,895.76
  4. Step 4: Simplify right side
    98,607.76x = 7,334,064,956.31
  5. Step 5: Solve for x
    x = 7,334,064,956.31/98,607.76
  6. Step 6: Final answer
    x = 74,376.14

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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.