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Finding the Fourth Proportional to 74,950.72, 112,403.52 and 61,770.40

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Solution

The fourth proportional to 74,950.72, 112,403.52 and 61,770.40 is: 92,637.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,950.72 : 112,403.52 = 61,770.40 : x
  2. Step 2: Convert to fraction form
    74,950.72/112,403.52 = 61,770.40/x
  3. Step 3: Cross multiply
    74,950.72x = 112,403.52 × 61,770.40
  4. Step 4: Simplify right side
    74,950.72x = 6,943,210,391.81
  5. Step 5: Solve for x
    x = 6,943,210,391.81/74,950.72
  6. Step 6: Final answer
    x = 92,637.01

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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.