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Finding the Fourth Proportional to 188,455.79, 260,129.59 and 120,655.37

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Solution

The fourth proportional to 188,455.79, 260,129.59 and 120,655.37 is: 166,543.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    188,455.79 : 260,129.59 = 120,655.37 : x
  2. Step 2: Convert to fraction form
    188,455.79/260,129.59 = 120,655.37/x
  3. Step 3: Cross multiply
    188,455.79x = 260,129.59 × 120,655.37
  4. Step 4: Simplify right side
    188,455.79x = 31,386,032,278.08
  5. Step 5: Solve for x
    x = 31,386,032,278.08/188,455.79
  6. Step 6: Final answer
    x = 166,543.21

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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.