Home / 79,420.74-109,252.35-66,430.14

Finding the Fourth Proportional to 79,420.74, 109,252.35 and 66,430.14

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Solution

The fourth proportional to 79,420.74, 109,252.35 and 66,430.14 is: 91,382.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,420.74 : 109,252.35 = 66,430.14 : x
  2. Step 2: Convert to fraction form
    79,420.74/109,252.35 = 66,430.14/x
  3. Step 3: Cross multiply
    79,420.74x = 109,252.35 × 66,430.14
  4. Step 4: Simplify right side
    79,420.74x = 7,257,648,905.83
  5. Step 5: Solve for x
    x = 7,257,648,905.83/79,420.74
  6. Step 6: Final answer
    x = 91,382.29

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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.