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Finding the Fourth Proportional to 101,420.28, 139,960.90 and 56,095.88

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Solution

The fourth proportional to 101,420.28, 139,960.90 and 56,095.88 is: 77,412.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,420.28 : 139,960.90 = 56,095.88 : x
  2. Step 2: Convert to fraction form
    101,420.28/139,960.90 = 56,095.88/x
  3. Step 3: Cross multiply
    101,420.28x = 139,960.90 × 56,095.88
  4. Step 4: Simplify right side
    101,420.28x = 7,851,229,851.09
  5. Step 5: Solve for x
    x = 7,851,229,851.09/101,420.28
  6. Step 6: Final answer
    x = 77,412.82

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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.