Home / 154,809.36-213,420.96-103,831.20

Finding the Fourth Proportional to 154,809.36, 213,420.96 and 103,831.20

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Solution

The fourth proportional to 154,809.36, 213,420.96 and 103,831.20 is: 143,142.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,809.36 : 213,420.96 = 103,831.20 : x
  2. Step 2: Convert to fraction form
    154,809.36/213,420.96 = 103,831.20/x
  3. Step 3: Cross multiply
    154,809.36x = 213,420.96 × 103,831.20
  4. Step 4: Simplify right side
    154,809.36x = 22,159,754,381.95
  5. Step 5: Solve for x
    x = 22,159,754,381.95/154,809.36
  6. Step 6: Final answer
    x = 143,142.21

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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.