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Finding the Fourth Proportional to 130,005.68, 179,405.60 and 72,645.93

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Solution

The fourth proportional to 130,005.68, 179,405.60 and 72,645.93 is: 100,250.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    130,005.68 : 179,405.60 = 72,645.93 : x
  2. Step 2: Convert to fraction form
    130,005.68/179,405.60 = 72,645.93/x
  3. Step 3: Cross multiply
    130,005.68x = 179,405.60 × 72,645.93
  4. Step 4: Simplify right side
    130,005.68x = 13,033,086,295.98
  5. Step 5: Solve for x
    x = 13,033,086,295.98/130,005.68
  6. Step 6: Final answer
    x = 100,250.13

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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.