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Finding the Fourth Proportional to 101,179.40, 139,623.89 and 55,856.40

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Solution

The fourth proportional to 101,179.40, 139,623.89 and 55,856.40 is: 77,079.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,179.40 : 139,623.89 = 55,856.40 : x
  2. Step 2: Convert to fraction form
    101,179.40/139,623.89 = 55,856.40/x
  3. Step 3: Cross multiply
    101,179.40x = 139,623.89 × 55,856.40
  4. Step 4: Simplify right side
    101,179.40x = 7,798,887,849.40
  5. Step 5: Solve for x
    x = 7,798,887,849.40/101,179.40
  6. Step 6: Final answer
    x = 77,079.80

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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.