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Finding the Fourth Proportional to 101,387.88, 139,903.05 and 56,059.74

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Solution

The fourth proportional to 101,387.88, 139,903.05 and 56,059.74 is: 77,355.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,387.88 : 139,903.05 = 56,059.74 : x
  2. Step 2: Convert to fraction form
    101,387.88/139,903.05 = 56,059.74/x
  3. Step 3: Cross multiply
    101,387.88x = 139,903.05 × 56,059.74
  4. Step 4: Simplify right side
    101,387.88x = 7,842,928,608.21
  5. Step 5: Solve for x
    x = 7,842,928,608.21/101,387.88
  6. Step 6: Final answer
    x = 77,355.68

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1.5x scale

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.