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Finding the Fourth Proportional to 86,141.94, 118,933.65 and 77,038.74

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Solution

The fourth proportional to 86,141.94, 118,933.65 and 77,038.74 is: 106,365.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,141.94 : 118,933.65 = 77,038.74 : x
  2. Step 2: Convert to fraction form
    86,141.94/118,933.65 = 77,038.74/x
  3. Step 3: Cross multiply
    86,141.94x = 118,933.65 × 77,038.74
  4. Step 4: Simplify right side
    86,141.94x = 9,162,498,539.60
  5. Step 5: Solve for x
    x = 9,162,498,539.60/86,141.94
  6. Step 6: Final answer
    x = 106,365.13

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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.