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Finding the Fourth Proportional to 66,859.70, 92,254.29 and 42,980.90

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Solution

The fourth proportional to 66,859.70, 92,254.29 and 42,980.90 is: 59,305.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,859.70 : 92,254.29 = 42,980.90 : x
  2. Step 2: Convert to fraction form
    66,859.70/92,254.29 = 42,980.90/x
  3. Step 3: Cross multiply
    66,859.70x = 92,254.29 × 42,980.90
  4. Step 4: Simplify right side
    66,859.70x = 3,965,172,413.06
  5. Step 5: Solve for x
    x = 3,965,172,413.06/66,859.70
  6. Step 6: Final answer
    x = 59,305.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.