Home / 142,419.36-196,521.12-78,758.40

Finding the Fourth Proportional to 142,419.36, 196,521.12 and 78,758.40

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Solution

The fourth proportional to 142,419.36, 196,521.12 and 78,758.40 is: 108,676.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,419.36 : 196,521.12 = 78,758.40 : x
  2. Step 2: Convert to fraction form
    142,419.36/196,521.12 = 78,758.40/x
  3. Step 3: Cross multiply
    142,419.36x = 196,521.12 × 78,758.40
  4. Step 4: Simplify right side
    142,419.36x = 15,477,688,977.41
  5. Step 5: Solve for x
    x = 15,477,688,977.41/142,419.36
  6. Step 6: Final answer
    x = 108,676.86

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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.