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Finding the Fourth Proportional to 77,885.19, 107,411.00 and 51,017.90

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Solution

The fourth proportional to 77,885.19, 107,411.00 and 51,017.90 is: 70,358.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,885.19 : 107,411.00 = 51,017.90 : x
  2. Step 2: Convert to fraction form
    77,885.19/107,411.00 = 51,017.90/x
  3. Step 3: Cross multiply
    77,885.19x = 107,411.00 × 51,017.90
  4. Step 4: Simplify right side
    77,885.19x = 5,479,882,864.76
  5. Step 5: Solve for x
    x = 5,479,882,864.76/77,885.19
  6. Step 6: Final answer
    x = 70,358.47

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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.