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Finding the Fourth Proportional to 70,909.53, 97,854.66 and 39,078.47

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Solution

The fourth proportional to 70,909.53, 97,854.66 and 39,078.47 is: 53,928.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,909.53 : 97,854.66 = 39,078.47 : x
  2. Step 2: Convert to fraction form
    70,909.53/97,854.66 = 39,078.47/x
  3. Step 3: Cross multiply
    70,909.53x = 97,854.66 × 39,078.47
  4. Step 4: Simplify right side
    70,909.53x = 3,824,009,905.90
  5. Step 5: Solve for x
    x = 3,824,009,905.90/70,909.53
  6. Step 6: Final answer
    x = 53,928.01

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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.