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Finding the Fourth Proportional to 101,421.28, 139,962.28 and 56,096.88

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Solution

The fourth proportional to 101,421.28, 139,962.28 and 56,096.88 is: 77,414.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,421.28 : 139,962.28 = 56,096.88 : x
  2. Step 2: Convert to fraction form
    101,421.28/139,962.28 = 56,096.88/x
  3. Step 3: Cross multiply
    101,421.28x = 139,962.28 × 56,096.88
  4. Step 4: Simplify right side
    101,421.28x = 7,851,447,225.69
  5. Step 5: Solve for x
    x = 7,851,447,225.69/101,421.28
  6. Step 6: Final answer
    x = 77,414.20

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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.