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Finding the Fourth Proportional to 66,859.45, 92,253.95 and 42,980.65

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Solution

The fourth proportional to 66,859.45, 92,253.95 and 42,980.65 is: 59,305.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,859.45 : 92,253.95 = 42,980.65 : x
  2. Step 2: Convert to fraction form
    66,859.45/92,253.95 = 42,980.65/x
  3. Step 3: Cross multiply
    66,859.45x = 92,253.95 × 42,980.65
  4. Step 4: Simplify right side
    66,859.45x = 3,965,134,521.16
  5. Step 5: Solve for x
    x = 3,965,134,521.16/66,859.45
  6. Step 6: Final answer
    x = 59,305.52

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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.