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Finding the Fourth Proportional to 101,383.80, 139,904.46 and 56,671.80

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Solution

The fourth proportional to 101,383.80, 139,904.46 and 56,671.80 is: 78,204.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,383.80 : 139,904.46 = 56,671.80 : x
  2. Step 2: Convert to fraction form
    101,383.80/139,904.46 = 56,671.80/x
  3. Step 3: Cross multiply
    101,383.80x = 139,904.46 × 56,671.80
  4. Step 4: Simplify right side
    101,383.80x = 7,928,637,576.23
  5. Step 5: Solve for x
    x = 7,928,637,576.23/101,383.80
  6. Step 6: Final answer
    x = 78,204.19

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1.5x scale

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.