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Finding the Fourth Proportional to 101,369.88, 139,888.14 and 56,045.88

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Solution

The fourth proportional to 101,369.88, 139,888.14 and 56,045.88 is: 77,342.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,369.88 : 139,888.14 = 56,045.88 : x
  2. Step 2: Convert to fraction form
    101,369.88/139,888.14 = 56,045.88/x
  3. Step 3: Cross multiply
    101,369.88x = 139,888.14 × 56,045.88
  4. Step 4: Simplify right side
    101,369.88x = 7,840,153,907.86
  5. Step 5: Solve for x
    x = 7,840,153,907.86/101,369.88
  6. Step 6: Final answer
    x = 77,342.05

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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.