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Finding the Fourth Proportional to 99,615.71, 137,453.88 and 55,999.64

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Solution

The fourth proportional to 99,615.71, 137,453.88 and 55,999.64 is: 77,270.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,615.71 : 137,453.88 = 55,999.64 : x
  2. Step 2: Convert to fraction form
    99,615.71/137,453.88 = 55,999.64/x
  3. Step 3: Cross multiply
    99,615.71x = 137,453.88 × 55,999.64
  4. Step 4: Simplify right side
    99,615.71x = 7,697,367,109.33
  5. Step 5: Solve for x
    x = 7,697,367,109.33/99,615.71
  6. Step 6: Final answer
    x = 77,270.62

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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.