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Finding the Fourth Proportional to 98,458.76, 135,871.35 and 56,016.38

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Solution

The fourth proportional to 98,458.76, 135,871.35 and 56,016.38 is: 77,301.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,458.76 : 135,871.35 = 56,016.38 : x
  2. Step 2: Convert to fraction form
    98,458.76/135,871.35 = 56,016.38/x
  3. Step 3: Cross multiply
    98,458.76x = 135,871.35 × 56,016.38
  4. Step 4: Simplify right side
    98,458.76x = 7,611,021,172.71
  5. Step 5: Solve for x
    x = 7,611,021,172.71/98,458.76
  6. Step 6: Final answer
    x = 77,301.62

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1.5x scale

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.