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Finding the Fourth Proportional to 85,913.76, 128,888.40 and 33,323.04

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Solution

The fourth proportional to 85,913.76, 128,888.40 and 33,323.04 is: 49,991.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,913.76 : 128,888.40 = 33,323.04 : x
  2. Step 2: Convert to fraction form
    85,913.76/128,888.40 = 33,323.04/x
  3. Step 3: Cross multiply
    85,913.76x = 128,888.40 × 33,323.04
  4. Step 4: Simplify right side
    85,913.76x = 4,294,953,308.74
  5. Step 5: Solve for x
    x = 4,294,953,308.74/85,913.76
  6. Step 6: Final answer
    x = 49,991.45

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1.5x scale

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.