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Finding the Fourth Proportional to 101,235, 139,712.94 and 56,531.64

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Solution

The fourth proportional to 101,235, 139,712.94 and 56,531.64 is: 78,018.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,235 : 139,712.94 = 56,531.64 : x
  2. Step 2: Convert to fraction form
    101,235/139,712.94 = 56,531.64/x
  3. Step 3: Cross multiply
    101,235x = 139,712.94 × 56,531.64
  4. Step 4: Simplify right side
    101,235x = 7,898,201,627.42
  5. Step 5: Solve for x
    x = 7,898,201,627.42/101,235
  6. Step 6: Final answer
    x = 78,018.49

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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.