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Finding the Fourth Proportional to 91,705.92, 126,549.72 and 51,424.08

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Solution

The fourth proportional to 91,705.92, 126,549.72 and 51,424.08 is: 70,962.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,705.92 : 126,549.72 = 51,424.08 : x
  2. Step 2: Convert to fraction form
    91,705.92/126,549.72 = 51,424.08/x
  3. Step 3: Cross multiply
    91,705.92x = 126,549.72 × 51,424.08
  4. Step 4: Simplify right side
    91,705.92x = 6,507,702,925.26
  5. Step 5: Solve for x
    x = 6,507,702,925.26/91,705.92
  6. Step 6: Final answer
    x = 70,962.74

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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.