Home / 102,880.18-142,023.18-77,396.23

Finding the Fourth Proportional to 102,880.18, 142,023.18 and 77,396.23

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Solution

The fourth proportional to 102,880.18, 142,023.18 and 77,396.23 is: 106,843.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,880.18 : 142,023.18 = 77,396.23 : x
  2. Step 2: Convert to fraction form
    102,880.18/142,023.18 = 77,396.23/x
  3. Step 3: Cross multiply
    102,880.18x = 142,023.18 × 77,396.23
  4. Step 4: Simplify right side
    102,880.18x = 10,992,058,704.61
  5. Step 5: Solve for x
    x = 10,992,058,704.61/102,880.18
  6. Step 6: Final answer
    x = 106,843.31

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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.