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Finding the Fourth Proportional to 368,678.79, 553,043.18 and 125,420.82

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Solution

The fourth proportional to 368,678.79, 553,043.18 and 125,420.82 is: 188,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,678.79 : 553,043.18 = 125,420.82 : x
  2. Step 2: Convert to fraction form
    368,678.79/553,043.18 = 125,420.82/x
  3. Step 3: Cross multiply
    368,678.79x = 553,043.18 × 125,420.82
  4. Step 4: Simplify right side
    368,678.79x = 69,363,128,503.90
  5. Step 5: Solve for x
    x = 69,363,128,503.90/368,678.79
  6. Step 6: Final answer
    x = 188,139.73

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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.