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Finding the Fourth Proportional to 85,833.60, 128,762.55 and 26,663.10

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Solution

The fourth proportional to 85,833.60, 128,762.55 and 26,663.10 is: 39,998.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,833.60 : 128,762.55 = 26,663.10 : x
  2. Step 2: Convert to fraction form
    85,833.60/128,762.55 = 26,663.10/x
  3. Step 3: Cross multiply
    85,833.60x = 128,762.55 × 26,663.10
  4. Step 4: Simplify right side
    85,833.60x = 3,433,208,746.91
  5. Step 5: Solve for x
    x = 3,433,208,746.91/85,833.60
  6. Step 6: Final answer
    x = 39,998.42

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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.