Home / 78,011.75-107,655.63-42,201.25

Finding the Fourth Proportional to 78,011.75, 107,655.63 and 42,201.25

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Solution

The fourth proportional to 78,011.75, 107,655.63 and 42,201.25 is: 58,237.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,011.75 : 107,655.63 = 42,201.25 : x
  2. Step 2: Convert to fraction form
    78,011.75/107,655.63 = 42,201.25/x
  3. Step 3: Cross multiply
    78,011.75x = 107,655.63 × 42,201.25
  4. Step 4: Simplify right side
    78,011.75x = 4,543,201,617.26
  5. Step 5: Solve for x
    x = 4,543,201,617.26/78,011.75
  6. Step 6: Final answer
    x = 58,237.40

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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.