Home / 145,899.36-201,340.80-78,831.36

Finding the Fourth Proportional to 145,899.36, 201,340.80 and 78,831.36

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Solution

The fourth proportional to 145,899.36, 201,340.80 and 78,831.36 is: 108,787.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,899.36 : 201,340.80 = 78,831.36 : x
  2. Step 2: Convert to fraction form
    145,899.36/201,340.80 = 78,831.36/x
  3. Step 3: Cross multiply
    145,899.36x = 201,340.80 × 78,831.36
  4. Step 4: Simplify right side
    145,899.36x = 15,871,969,087.49
  5. Step 5: Solve for x
    x = 15,871,969,087.49/145,899.36
  6. Step 6: Final answer
    x = 108,787.11

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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.