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Finding the Fourth Proportional to 67,959.81, 93,720.24 and 56,643.30

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Solution

The fourth proportional to 67,959.81, 93,720.24 and 56,643.30 is: 78,114.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,959.81 : 93,720.24 = 56,643.30 : x
  2. Step 2: Convert to fraction form
    67,959.81/93,720.24 = 56,643.30/x
  3. Step 3: Cross multiply
    67,959.81x = 93,720.24 × 56,643.30
  4. Step 4: Simplify right side
    67,959.81x = 5,308,623,670.39
  5. Step 5: Solve for x
    x = 5,308,623,670.39/67,959.81
  6. Step 6: Final answer
    x = 78,114.16

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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.