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Finding the Fourth Proportional to 98,543.69, 135,990.27 and 53,221.67

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Solution

The fourth proportional to 98,543.69, 135,990.27 and 53,221.67 is: 73,445.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,543.69 : 135,990.27 = 53,221.67 : x
  2. Step 2: Convert to fraction form
    98,543.69/135,990.27 = 53,221.67/x
  3. Step 3: Cross multiply
    98,543.69x = 135,990.27 × 53,221.67
  4. Step 4: Simplify right side
    98,543.69x = 7,237,628,593.20
  5. Step 5: Solve for x
    x = 7,237,628,593.20/98,543.69
  6. Step 6: Final answer
    x = 73,445.89

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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.