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Finding the Fourth Proportional to 86,762.78, 130,078.18 and 60,037.74

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Solution

The fourth proportional to 86,762.78, 130,078.18 and 60,037.74 is: 90,010.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,762.78 : 130,078.18 = 60,037.74 : x
  2. Step 2: Convert to fraction form
    86,762.78/130,078.18 = 60,037.74/x
  3. Step 3: Cross multiply
    86,762.78x = 130,078.18 × 60,037.74
  4. Step 4: Simplify right side
    86,762.78x = 7,809,599,950.51
  5. Step 5: Solve for x
    x = 7,809,599,950.51/86,762.78
  6. Step 6: Final answer
    x = 90,010.95

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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.