Home / 151,239.22-208,688.87-100,172.77

Finding the Fourth Proportional to 151,239.22, 208,688.87 and 100,172.77

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Solution

The fourth proportional to 151,239.22, 208,688.87 and 100,172.77 is: 138,224.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,239.22 : 208,688.87 = 100,172.77 : x
  2. Step 2: Convert to fraction form
    151,239.22/208,688.87 = 100,172.77/x
  3. Step 3: Cross multiply
    151,239.22x = 208,688.87 × 100,172.77
  4. Step 4: Simplify right side
    151,239.22x = 20,904,941,904.78
  5. Step 5: Solve for x
    x = 20,904,941,904.78/151,239.22
  6. Step 6: Final answer
    x = 138,224.35

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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.