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Finding the Fourth Proportional to 132,403.60, 198,605.40 and 90,413.20

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Solution

The fourth proportional to 132,403.60, 198,605.40 and 90,413.20 is: 135,619.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,403.60 : 198,605.40 = 90,413.20 : x
  2. Step 2: Convert to fraction form
    132,403.60/198,605.40 = 90,413.20/x
  3. Step 3: Cross multiply
    132,403.60x = 198,605.40 × 90,413.20
  4. Step 4: Simplify right side
    132,403.60x = 17,956,549,751.28
  5. Step 5: Solve for x
    x = 17,956,549,751.28/132,403.60
  6. Step 6: Final answer
    x = 135,619.80

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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.