Home / 142,077.78-196,066.94-78,415.13

Finding the Fourth Proportional to 142,077.78, 196,066.94 and 78,415.13

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Solution

The fourth proportional to 142,077.78, 196,066.94 and 78,415.13 is: 108,212.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,077.78 : 196,066.94 = 78,415.13 : x
  2. Step 2: Convert to fraction form
    142,077.78/196,066.94 = 78,415.13/x
  3. Step 3: Cross multiply
    142,077.78x = 196,066.94 × 78,415.13
  4. Step 4: Simplify right side
    142,077.78x = 15,374,613,510.45
  5. Step 5: Solve for x
    x = 15,374,613,510.45/142,077.78
  6. Step 6: Final answer
    x = 108,212.65

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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.