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Finding the Fourth Proportional to 98,430.15, 135,832.42 and 55,988.58

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Solution

The fourth proportional to 98,430.15, 135,832.42 and 55,988.58 is: 77,263.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,430.15 : 135,832.42 = 55,988.58 : x
  2. Step 2: Convert to fraction form
    98,430.15/135,832.42 = 55,988.58/x
  3. Step 3: Cross multiply
    98,430.15x = 135,832.42 × 55,988.58
  4. Step 4: Simplify right side
    98,430.15x = 7,605,063,354.66
  5. Step 5: Solve for x
    x = 7,605,063,354.66/98,430.15
  6. Step 6: Final answer
    x = 77,263.56

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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.