Home / 142,409.57-196,521.32-78,745.19

Finding the Fourth Proportional to 142,409.57, 196,521.32 and 78,745.19

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Solution

The fourth proportional to 142,409.57, 196,521.32 and 78,745.19 is: 108,666.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,409.57 : 196,521.32 = 78,745.19 : x
  2. Step 2: Convert to fraction form
    142,409.57/196,521.32 = 78,745.19/x
  3. Step 3: Cross multiply
    142,409.57x = 196,521.32 × 78,745.19
  4. Step 4: Simplify right side
    142,409.57x = 15,475,108,682.45
  5. Step 5: Solve for x
    x = 15,475,108,682.45/142,409.57
  6. Step 6: Final answer
    x = 108,666.21

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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.