Home / 78,189.44-107,901.81-42,379.13

Finding the Fourth Proportional to 78,189.44, 107,901.81 and 42,379.13

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Solution

The fourth proportional to 78,189.44, 107,901.81 and 42,379.13 is: 58,483.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,189.44 : 107,901.81 = 42,379.13 : x
  2. Step 2: Convert to fraction form
    78,189.44/107,901.81 = 42,379.13/x
  3. Step 3: Cross multiply
    78,189.44x = 107,901.81 × 42,379.13
  4. Step 4: Simplify right side
    78,189.44x = 4,572,785,102.98
  5. Step 5: Solve for x
    x = 4,572,785,102.98/78,189.44
  6. Step 6: Final answer
    x = 58,483.41

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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.