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Finding the Fourth Proportional to 66,496.32, 91,681.92 and 42,583.68

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Solution

The fourth proportional to 66,496.32, 91,681.92 and 42,583.68 is: 58,712.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,496.32 : 91,681.92 = 42,583.68 : x
  2. Step 2: Convert to fraction form
    66,496.32/91,681.92 = 42,583.68/x
  3. Step 3: Cross multiply
    66,496.32x = 91,681.92 × 42,583.68
  4. Step 4: Simplify right side
    66,496.32x = 3,904,153,543.07
  5. Step 5: Solve for x
    x = 3,904,153,543.07/66,496.32
  6. Step 6: Final answer
    x = 58,712.32

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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.