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Finding the Fourth Proportional to 101,343.90, 139,849.11 and 56,019.18

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Solution

The fourth proportional to 101,343.90, 139,849.11 and 56,019.18 is: 77,303.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,343.90 : 139,849.11 = 56,019.18 : x
  2. Step 2: Convert to fraction form
    101,343.90/139,849.11 = 56,019.18/x
  3. Step 3: Cross multiply
    101,343.90x = 139,849.11 × 56,019.18
  4. Step 4: Simplify right side
    101,343.90x = 7,834,232,465.93
  5. Step 5: Solve for x
    x = 7,834,232,465.93/101,343.90
  6. Step 6: Final answer
    x = 77,303.44

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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.