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Finding the Fourth Proportional to 86,940.60, 130,497.30 and 42,617.40

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Solution

The fourth proportional to 86,940.60, 130,497.30 and 42,617.40 is: 63,968.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,940.60 : 130,497.30 = 42,617.40 : x
  2. Step 2: Convert to fraction form
    86,940.60/130,497.30 = 42,617.40/x
  3. Step 3: Cross multiply
    86,940.60x = 130,497.30 × 42,617.40
  4. Step 4: Simplify right side
    86,940.60x = 5,561,455,633.02
  5. Step 5: Solve for x
    x = 5,561,455,633.02/86,940.60
  6. Step 6: Final answer
    x = 63,968.45

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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.