Home / 142,125.14-196,128.95-78,461.57

Finding the Fourth Proportional to 142,125.14, 196,128.95 and 78,461.57

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Solution

The fourth proportional to 142,125.14, 196,128.95 and 78,461.57 is: 108,274.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,125.14 : 196,128.95 = 78,461.57 : x
  2. Step 2: Convert to fraction form
    142,125.14/196,128.95 = 78,461.57/x
  3. Step 3: Cross multiply
    142,125.14x = 196,128.95 × 78,461.57
  4. Step 4: Simplify right side
    142,125.14x = 15,388,585,437.47
  5. Step 5: Solve for x
    x = 15,388,585,437.47/142,125.14
  6. Step 6: Final answer
    x = 108,274.90

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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.