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Finding the Fourth Proportional to 98,270.90, 135,614.30 and 55,831.76

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Solution

The fourth proportional to 98,270.90, 135,614.30 and 55,831.76 is: 77,048.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,270.90 : 135,614.30 = 55,831.76 : x
  2. Step 2: Convert to fraction form
    98,270.90/135,614.30 = 55,831.76/x
  3. Step 3: Cross multiply
    98,270.90x = 135,614.30 × 55,831.76
  4. Step 4: Simplify right side
    98,270.90x = 7,571,585,050.17
  5. Step 5: Solve for x
    x = 7,571,585,050.17/98,270.90
  6. Step 6: Final answer
    x = 77,048.09

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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.