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Finding the Fourth Proportional to 66,980.16, 92,439.84 and 42,803.16

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Solution

The fourth proportional to 66,980.16, 92,439.84 and 42,803.16 is: 59,072.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,980.16 : 92,439.84 = 42,803.16 : x
  2. Step 2: Convert to fraction form
    66,980.16/92,439.84 = 42,803.16/x
  3. Step 3: Cross multiply
    66,980.16x = 92,439.84 × 42,803.16
  4. Step 4: Simplify right side
    66,980.16x = 3,956,717,261.89
  5. Step 5: Solve for x
    x = 3,956,717,261.89/66,980.16
  6. Step 6: Final answer
    x = 59,072.97

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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.