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Finding the Fourth Proportional to 101,395.45, 139,921.68 and 56,070.46

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Solution

The fourth proportional to 101,395.45, 139,921.68 and 56,070.46 is: 77,375.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,395.45 : 139,921.68 = 56,070.46 : x
  2. Step 2: Convert to fraction form
    101,395.45/139,921.68 = 56,070.46/x
  3. Step 3: Cross multiply
    101,395.45x = 139,921.68 × 56,070.46
  4. Step 4: Simplify right side
    101,395.45x = 7,845,472,961.57
  5. Step 5: Solve for x
    x = 7,845,472,961.57/101,395.45
  6. Step 6: Final answer
    x = 77,375.00

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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.