Home / 78,190.07-107,901.87-42,379.70

Finding the Fourth Proportional to 78,190.07, 107,901.87 and 42,379.70

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Solution

The fourth proportional to 78,190.07, 107,901.87 and 42,379.70 is: 58,483.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,190.07 : 107,901.87 = 42,379.70 : x
  2. Step 2: Convert to fraction form
    78,190.07/107,901.87 = 42,379.70/x
  3. Step 3: Cross multiply
    78,190.07x = 107,901.87 × 42,379.70
  4. Step 4: Simplify right side
    78,190.07x = 4,572,848,880.04
  5. Step 5: Solve for x
    x = 4,572,848,880.04/78,190.07
  6. Step 6: Final answer
    x = 58,483.75

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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.