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Finding the Fourth Proportional to 142,942.60, 214,413.90 and 129,820.60

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Solution

The fourth proportional to 142,942.60, 214,413.90 and 129,820.60 is: 194,730.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,942.60 : 214,413.90 = 129,820.60 : x
  2. Step 2: Convert to fraction form
    142,942.60/214,413.90 = 129,820.60/x
  3. Step 3: Cross multiply
    142,942.60x = 214,413.90 × 129,820.60
  4. Step 4: Simplify right side
    142,942.60x = 27,835,341,146.34
  5. Step 5: Solve for x
    x = 27,835,341,146.34/142,942.60
  6. Step 6: Final answer
    x = 194,730.90

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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.