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Finding the Fourth Proportional to 98,543.51, 135,990.03 and 53,221.49

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Solution

The fourth proportional to 98,543.51, 135,990.03 and 53,221.49 is: 73,445.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,543.51 : 135,990.03 = 53,221.49 : x
  2. Step 2: Convert to fraction form
    98,543.51/135,990.03 = 53,221.49/x
  3. Step 3: Cross multiply
    98,543.51x = 135,990.03 × 53,221.49
  4. Step 4: Simplify right side
    98,543.51x = 7,237,592,021.74
  5. Step 5: Solve for x
    x = 7,237,592,021.74/98,543.51
  6. Step 6: Final answer
    x = 73,445.65

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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.