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Finding the Fourth Proportional to 86,210.80, 129,413.40 and 66,576.40

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Solution

The fourth proportional to 86,210.80, 129,413.40 and 66,576.40 is: 99,939.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,210.80 : 129,413.40 = 66,576.40 : x
  2. Step 2: Convert to fraction form
    86,210.80/129,413.40 = 66,576.40/x
  3. Step 3: Cross multiply
    86,210.80x = 129,413.40 × 66,576.40
  4. Step 4: Simplify right side
    86,210.80x = 8,615,878,283.76
  5. Step 5: Solve for x
    x = 8,615,878,283.76/86,210.80
  6. Step 6: Final answer
    x = 99,939.66

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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.