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Finding the Fourth Proportional to 98,145.76, 135,437.12 and 55,703.52

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Solution

The fourth proportional to 98,145.76, 135,437.12 and 55,703.52 is: 76,868.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,145.76 : 135,437.12 = 55,703.52 : x
  2. Step 2: Convert to fraction form
    98,145.76/135,437.12 = 55,703.52/x
  3. Step 3: Cross multiply
    98,145.76x = 135,437.12 × 55,703.52
  4. Step 4: Simplify right side
    98,145.76x = 7,544,324,322.66
  5. Step 5: Solve for x
    x = 7,544,324,322.66/98,145.76
  6. Step 6: Final answer
    x = 76,868.57

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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.