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Finding the Fourth Proportional to 77,989.14, 107,712.45 and 52,794.90

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Solution

The fourth proportional to 77,989.14, 107,712.45 and 52,794.90 is: 72,916.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,989.14 : 107,712.45 = 52,794.90 : x
  2. Step 2: Convert to fraction form
    77,989.14/107,712.45 = 52,794.90/x
  3. Step 3: Cross multiply
    77,989.14x = 107,712.45 × 52,794.90
  4. Step 4: Simplify right side
    77,989.14x = 5,686,668,026.51
  5. Step 5: Solve for x
    x = 5,686,668,026.51/77,989.14
  6. Step 6: Final answer
    x = 72,916.15

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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.