Home / 86,380.32-129,368.88-66,501.12

Finding the Fourth Proportional to 86,380.32, 129,368.88 and 66,501.12

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Solution

The fourth proportional to 86,380.32, 129,368.88 and 66,501.12 is: 99,596.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,380.32 : 129,368.88 = 66,501.12 : x
  2. Step 2: Convert to fraction form
    86,380.32/129,368.88 = 66,501.12/x
  3. Step 3: Cross multiply
    86,380.32x = 129,368.88 × 66,501.12
  4. Step 4: Simplify right side
    86,380.32x = 8,603,175,413.15
  5. Step 5: Solve for x
    x = 8,603,175,413.15/86,380.32
  6. Step 6: Final answer
    x = 99,596.48

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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.