Home / 142,126.14-196,130.32-78,462.57

Finding the Fourth Proportional to 142,126.14, 196,130.32 and 78,462.57

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Solution

The fourth proportional to 142,126.14, 196,130.32 and 78,462.57 is: 108,276.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,126.14 : 196,130.32 = 78,462.57 : x
  2. Step 2: Convert to fraction form
    142,126.14/196,130.32 = 78,462.57/x
  3. Step 3: Cross multiply
    142,126.14x = 196,130.32 × 78,462.57
  4. Step 4: Simplify right side
    142,126.14x = 15,388,888,962.12
  5. Step 5: Solve for x
    x = 15,388,888,962.12/142,126.14
  6. Step 6: Final answer
    x = 108,276.27

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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.