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Finding the Fourth Proportional to 78,678.79, 118,121.07 and 46,716.21

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Solution

The fourth proportional to 78,678.79, 118,121.07 and 46,716.21 is: 70,135.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678.79 : 118,121.07 = 46,716.21 : x
  2. Step 2: Convert to fraction form
    78,678.79/118,121.07 = 46,716.21/x
  3. Step 3: Cross multiply
    78,678.79x = 118,121.07 × 46,716.21
  4. Step 4: Simplify right side
    78,678.79x = 5,518,168,711.54
  5. Step 5: Solve for x
    x = 5,518,168,711.54/78,678.79
  6. Step 6: Final answer
    x = 70,135.40

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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.