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Finding the Fourth Proportional to 77,940.61, 107,587.12 and 60,678.77

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Solution

The fourth proportional to 77,940.61, 107,587.12 and 60,678.77 is: 83,759.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,940.61 : 107,587.12 = 60,678.77 : x
  2. Step 2: Convert to fraction form
    77,940.61/107,587.12 = 60,678.77/x
  3. Step 3: Cross multiply
    77,940.61x = 107,587.12 × 60,678.77
  4. Step 4: Simplify right side
    77,940.61x = 6,528,253,914.77
  5. Step 5: Solve for x
    x = 6,528,253,914.77/77,940.61
  6. Step 6: Final answer
    x = 83,759.34

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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.