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Finding the Fourth Proportional to 151,369.68, 208,858.20 and 87,703.60

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Solution

The fourth proportional to 151,369.68, 208,858.20 and 87,703.60 is: 121,012.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,369.68 : 208,858.20 = 87,703.60 : x
  2. Step 2: Convert to fraction form
    151,369.68/208,858.20 = 87,703.60/x
  3. Step 3: Cross multiply
    151,369.68x = 208,858.20 × 87,703.60
  4. Step 4: Simplify right side
    151,369.68x = 18,317,616,029.52
  5. Step 5: Solve for x
    x = 18,317,616,029.52/151,369.68
  6. Step 6: Final answer
    x = 121,012.45

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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.