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Finding the Fourth Proportional to 145,689.20, 218,413.80 and 65,732.40

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Solution

The fourth proportional to 145,689.20, 218,413.80 and 65,732.40 is: 98,544.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,689.20 : 218,413.80 = 65,732.40 : x
  2. Step 2: Convert to fraction form
    145,689.20/218,413.80 = 65,732.40/x
  3. Step 3: Cross multiply
    145,689.20x = 218,413.80 × 65,732.40
  4. Step 4: Simplify right side
    145,689.20x = 14,356,863,267.12
  5. Step 5: Solve for x
    x = 14,356,863,267.12/145,689.20
  6. Step 6: Final answer
    x = 98,544.46

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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.