Home / 77,680.89-107,192.16-45,423.05

Finding the Fourth Proportional to 77,680.89, 107,192.16 and 45,423.05

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Solution

The fourth proportional to 77,680.89, 107,192.16 and 45,423.05 is: 62,679.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,680.89 : 107,192.16 = 45,423.05 : x
  2. Step 2: Convert to fraction form
    77,680.89/107,192.16 = 45,423.05/x
  3. Step 3: Cross multiply
    77,680.89x = 107,192.16 × 45,423.05
  4. Step 4: Simplify right side
    77,680.89x = 4,868,994,307.33
  5. Step 5: Solve for x
    x = 4,868,994,307.33/77,680.89
  6. Step 6: Final answer
    x = 62,679.44

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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.