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Finding the Fourth Proportional to 245,585.72, 338,904.91 and 138,155.72

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Solution

The fourth proportional to 245,585.72, 338,904.91 and 138,155.72 is: 190,652.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,585.72 : 338,904.91 = 138,155.72 : x
  2. Step 2: Convert to fraction form
    245,585.72/338,904.91 = 138,155.72/x
  3. Step 3: Cross multiply
    245,585.72x = 338,904.91 × 138,155.72
  4. Step 4: Simplify right side
    245,585.72x = 46,821,649,812.67
  5. Step 5: Solve for x
    x = 46,821,649,812.67/245,585.72
  6. Step 6: Final answer
    x = 190,652.99

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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.