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Finding the Fourth Proportional to 101,388.88, 139,904.43 and 56,060.74

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Solution

The fourth proportional to 101,388.88, 139,904.43 and 56,060.74 is: 77,357.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,388.88 : 139,904.43 = 56,060.74 : x
  2. Step 2: Convert to fraction form
    101,388.88/139,904.43 = 56,060.74/x
  3. Step 3: Cross multiply
    101,388.88x = 139,904.43 × 56,060.74
  4. Step 4: Simplify right side
    101,388.88x = 7,843,145,875.08
  5. Step 5: Solve for x
    x = 7,843,145,875.08/101,388.88
  6. Step 6: Final answer
    x = 77,357.06

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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.