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Finding the Fourth Proportional to 245,496.70, 338,746.08 and 138,066.40

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Solution

The fourth proportional to 245,496.70, 338,746.08 and 138,066.40 is: 190,509.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,496.70 : 338,746.08 = 138,066.40 : x
  2. Step 2: Convert to fraction form
    245,496.70/338,746.08 = 138,066.40/x
  3. Step 3: Cross multiply
    245,496.70x = 338,746.08 × 138,066.40
  4. Step 4: Simplify right side
    245,496.70x = 46,769,451,779.71
  5. Step 5: Solve for x
    x = 46,769,451,779.71/245,496.70
  6. Step 6: Final answer
    x = 190,509.49

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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.