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Finding the Fourth Proportional to 101,312.64, 139,811.40 and 56,600.64

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Solution

The fourth proportional to 101,312.64, 139,811.40 and 56,600.64 is: 78,108.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,312.64 : 139,811.40 = 56,600.64 : x
  2. Step 2: Convert to fraction form
    101,312.64/139,811.40 = 56,600.64/x
  3. Step 3: Cross multiply
    101,312.64x = 139,811.40 × 56,600.64
  4. Step 4: Simplify right side
    101,312.64x = 7,913,414,719.30
  5. Step 5: Solve for x
    x = 7,913,414,719.30/101,312.64
  6. Step 6: Final answer
    x = 78,108.86

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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.