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Finding the Fourth Proportional to 139,348.80, 208,901.70 and 94,831.20

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Solution

The fourth proportional to 139,348.80, 208,901.70 and 94,831.20 is: 142,164.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,348.80 : 208,901.70 = 94,831.20 : x
  2. Step 2: Convert to fraction form
    139,348.80/208,901.70 = 94,831.20/x
  3. Step 3: Cross multiply
    139,348.80x = 208,901.70 × 94,831.20
  4. Step 4: Simplify right side
    139,348.80x = 19,810,398,893.04
  5. Step 5: Solve for x
    x = 19,810,398,893.04/139,348.80
  6. Step 6: Final answer
    x = 142,164.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.