Home / 142,824.32-213,880.80-86,690.24

Finding the Fourth Proportional to 142,824.32, 213,880.80 and 86,690.24

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Solution

The fourth proportional to 142,824.32, 213,880.80 and 86,690.24 is: 129,819.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,824.32 : 213,880.80 = 86,690.24 : x
  2. Step 2: Convert to fraction form
    142,824.32/213,880.80 = 86,690.24/x
  3. Step 3: Cross multiply
    142,824.32x = 213,880.80 × 86,690.24
  4. Step 4: Simplify right side
    142,824.32x = 18,541,377,883.39
  5. Step 5: Solve for x
    x = 18,541,377,883.39/142,824.32
  6. Step 6: Final answer
    x = 129,819.47

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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.