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Finding the Fourth Proportional to 245,521.68, 338,808.72 and 136,631.40

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Solution

The fourth proportional to 245,521.68, 338,808.72 and 136,631.40 is: 188,545.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,521.68 : 338,808.72 = 136,631.40 : x
  2. Step 2: Convert to fraction form
    245,521.68/338,808.72 = 136,631.40/x
  3. Step 3: Cross multiply
    245,521.68x = 338,808.72 × 136,631.40
  4. Step 4: Simplify right side
    245,521.68x = 46,291,909,745.81
  5. Step 5: Solve for x
    x = 46,291,909,745.81/245,521.68
  6. Step 6: Final answer
    x = 188,545.10

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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.