Home / 142,629.19-196,831.28-78,101.15

Finding the Fourth Proportional to 142,629.19, 196,831.28 and 78,101.15

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Solution

The fourth proportional to 142,629.19, 196,831.28 and 78,101.15 is: 107,781.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,629.19 : 196,831.28 = 78,101.15 : x
  2. Step 2: Convert to fraction form
    142,629.19/196,831.28 = 78,101.15/x
  3. Step 3: Cross multiply
    142,629.19x = 196,831.28 × 78,101.15
  4. Step 4: Simplify right side
    142,629.19x = 15,372,748,535.07
  5. Step 5: Solve for x
    x = 15,372,748,535.07/142,629.19
  6. Step 6: Final answer
    x = 107,781.22

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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.