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Finding the Fourth Proportional to 128,804.58, 193,262.49 and 69,681.90

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Solution

The fourth proportional to 128,804.58, 193,262.49 and 69,681.90 is: 104,552.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,804.58 : 193,262.49 = 69,681.90 : x
  2. Step 2: Convert to fraction form
    128,804.58/193,262.49 = 69,681.90/x
  3. Step 3: Cross multiply
    128,804.58x = 193,262.49 × 69,681.90
  4. Step 4: Simplify right side
    128,804.58x = 13,466,897,501.93
  5. Step 5: Solve for x
    x = 13,466,897,501.93/128,804.58
  6. Step 6: Final answer
    x = 104,552.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.