Home / 142,145.51-196,160.84-78,487.41

Finding the Fourth Proportional to 142,145.51, 196,160.84 and 78,487.41

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Solution

The fourth proportional to 142,145.51, 196,160.84 and 78,487.41 is: 108,312.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,145.51 : 196,160.84 = 78,487.41 : x
  2. Step 2: Convert to fraction form
    142,145.51/196,160.84 = 78,487.41/x
  3. Step 3: Cross multiply
    142,145.51x = 196,160.84 × 78,487.41
  4. Step 4: Simplify right side
    142,145.51x = 15,396,155,257.41
  5. Step 5: Solve for x
    x = 15,396,155,257.41/142,145.51
  6. Step 6: Final answer
    x = 108,312.64

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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.