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Finding the Fourth Proportional to 85,574.61, 128,417.81 and 38,827.89

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Solution

The fourth proportional to 85,574.61, 128,417.81 and 38,827.89 is: 58,267.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,574.61 : 128,417.81 = 38,827.89 : x
  2. Step 2: Convert to fraction form
    85,574.61/128,417.81 = 38,827.89/x
  3. Step 3: Cross multiply
    85,574.61x = 128,417.81 × 38,827.89
  4. Step 4: Simplify right side
    85,574.61x = 4,986,192,406.58
  5. Step 5: Solve for x
    x = 4,986,192,406.58/85,574.61
  6. Step 6: Final answer
    x = 58,267.19

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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.