Home / 135,412.26-186,867.62-78,030.50

Finding the Fourth Proportional to 135,412.26, 186,867.62 and 78,030.50

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Solution

The fourth proportional to 135,412.26, 186,867.62 and 78,030.50 is: 107,681.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,412.26 : 186,867.62 = 78,030.50 : x
  2. Step 2: Convert to fraction form
    135,412.26/186,867.62 = 78,030.50/x
  3. Step 3: Cross multiply
    135,412.26x = 186,867.62 × 78,030.50
  4. Step 4: Simplify right side
    135,412.26x = 14,581,373,822.41
  5. Step 5: Solve for x
    x = 14,581,373,822.41/135,412.26
  6. Step 6: Final answer
    x = 107,681.34

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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.