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Finding the Fourth Proportional to 245,443.53, 338,705.34 and 138,010.80

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Solution

The fourth proportional to 245,443.53, 338,705.34 and 138,010.80 is: 190,451.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,443.53 : 338,705.34 = 138,010.80 : x
  2. Step 2: Convert to fraction form
    245,443.53/338,705.34 = 138,010.80/x
  3. Step 3: Cross multiply
    245,443.53x = 338,705.34 × 138,010.80
  4. Step 4: Simplify right side
    245,443.53x = 46,744,994,937.67
  5. Step 5: Solve for x
    x = 46,744,994,937.67/245,443.53
  6. Step 6: Final answer
    x = 190,451.12

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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.