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Finding the Fourth Proportional to 78,831.70, 118,247.55 and 78,831.70

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Solution

The fourth proportional to 78,831.70, 118,247.55 and 78,831.70 is: 118,247.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,831.70 : 118,247.55 = 78,831.70 : x
  2. Step 2: Convert to fraction form
    78,831.70/118,247.55 = 78,831.70/x
  3. Step 3: Cross multiply
    78,831.70x = 118,247.55 × 78,831.70
  4. Step 4: Simplify right side
    78,831.70x = 9,321,655,387.34
  5. Step 5: Solve for x
    x = 9,321,655,387.34/78,831.70
  6. Step 6: Final answer
    x = 118,247.55

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1.5x scale

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.