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Finding the Fourth Proportional to 77,980.19, 117,022.20 and 42,450.48

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Solution

The fourth proportional to 77,980.19, 117,022.20 and 42,450.48 is: 63,703.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,980.19 : 117,022.20 = 42,450.48 : x
  2. Step 2: Convert to fraction form
    77,980.19/117,022.20 = 42,450.48/x
  3. Step 3: Cross multiply
    77,980.19x = 117,022.20 × 42,450.48
  4. Step 4: Simplify right side
    77,980.19x = 4,967,648,560.66
  5. Step 5: Solve for x
    x = 4,967,648,560.66/77,980.19
  6. Step 6: Final answer
    x = 63,703.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.