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Finding the Fourth Proportional to 77,981.58, 107,487.63 and 60,955.77

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Solution

The fourth proportional to 77,981.58, 107,487.63 and 60,955.77 is: 84,019.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,981.58 : 107,487.63 = 60,955.77 : x
  2. Step 2: Convert to fraction form
    77,981.58/107,487.63 = 60,955.77/x
  3. Step 3: Cross multiply
    77,981.58x = 107,487.63 × 60,955.77
  4. Step 4: Simplify right side
    77,981.58x = 6,551,991,252.13
  5. Step 5: Solve for x
    x = 6,551,991,252.13/77,981.58
  6. Step 6: Final answer
    x = 84,019.73

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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.