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Finding the Fourth Proportional to 121,888.64, 168,197.64 and 70,909.40

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Solution

The fourth proportional to 121,888.64, 168,197.64 and 70,909.40 is: 97,849.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,888.64 : 168,197.64 = 70,909.40 : x
  2. Step 2: Convert to fraction form
    121,888.64/168,197.64 = 70,909.40/x
  3. Step 3: Cross multiply
    121,888.64x = 168,197.64 × 70,909.40
  4. Step 4: Simplify right side
    121,888.64x = 11,926,793,733.82
  5. Step 5: Solve for x
    x = 11,926,793,733.82/121,888.64
  6. Step 6: Final answer
    x = 97,849.92

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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.