Home / 77,310.32-105,888.85-72,771.08

Finding the Fourth Proportional to 77,310.32, 105,888.85 and 72,771.08

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Solution

The fourth proportional to 77,310.32, 105,888.85 and 72,771.08 is: 99,671.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,310.32 : 105,888.85 = 72,771.08 : x
  2. Step 2: Convert to fraction form
    77,310.32/105,888.85 = 72,771.08/x
  3. Step 3: Cross multiply
    77,310.32x = 105,888.85 × 72,771.08
  4. Step 4: Simplify right side
    77,310.32x = 7,705,645,974.46
  5. Step 5: Solve for x
    x = 7,705,645,974.46/77,310.32
  6. Step 6: Final answer
    x = 99,671.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.