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Finding the Fourth Proportional to 85,703,613.60, 128,555,420.40 and 63,879,103.20

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Solution

The fourth proportional to 85,703,613.60, 128,555,420.40 and 63,879,103.20 is: 95,818,654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,703,613.60 : 128,555,420.40 = 63,879,103.20 : x
  2. Step 2: Convert to fraction form
    85,703,613.60/128,555,420.40 = 63,879,103.20/x
  3. Step 3: Cross multiply
    85,703,613.60x = 128,555,420.40 × 63,879,103.20
  4. Step 4: Simplify right side
    85,703,613.60x = 8,212,004,966,650,986
  5. Step 5: Solve for x
    x = 8,212,004,966,650,986/85,703,613.60
  6. Step 6: Final answer
    x = 95,818,654.80

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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.