Home / 142,050.39-196,022.88-81,578.40

Finding the Fourth Proportional to 142,050.39, 196,022.88 and 81,578.40

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Solution

The fourth proportional to 142,050.39, 196,022.88 and 81,578.40 is: 112,574.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,050.39 : 196,022.88 = 81,578.40 : x
  2. Step 2: Convert to fraction form
    142,050.39/196,022.88 = 81,578.40/x
  3. Step 3: Cross multiply
    142,050.39x = 196,022.88 × 81,578.40
  4. Step 4: Simplify right side
    142,050.39x = 15,991,232,913.79
  5. Step 5: Solve for x
    x = 15,991,232,913.79/142,050.39
  6. Step 6: Final answer
    x = 112,574.37

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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.