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Finding the Fourth Proportional to 77,889.69, 107,417.21 and 51,022.40

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Solution

The fourth proportional to 77,889.69, 107,417.21 and 51,022.40 is: 70,364.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,889.69 : 107,417.21 = 51,022.40 : x
  2. Step 2: Convert to fraction form
    77,889.69/107,417.21 = 51,022.40/x
  3. Step 3: Cross multiply
    77,889.69x = 107,417.21 × 51,022.40
  4. Step 4: Simplify right side
    77,889.69x = 5,480,683,063.31
  5. Step 5: Solve for x
    x = 5,480,683,063.31/77,889.69
  6. Step 6: Final answer
    x = 70,364.68

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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.