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Finding the Fourth Proportional to 245,543.78, 338,754.48 and 138,089.18

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Solution

The fourth proportional to 245,543.78, 338,754.48 and 138,089.18 is: 190,509.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,543.78 : 338,754.48 = 138,089.18 : x
  2. Step 2: Convert to fraction form
    245,543.78/338,754.48 = 138,089.18/x
  3. Step 3: Cross multiply
    245,543.78x = 338,754.48 × 138,089.18
  4. Step 4: Simplify right side
    245,543.78x = 46,778,328,364.53
  5. Step 5: Solve for x
    x = 46,778,328,364.53/245,543.78
  6. Step 6: Final answer
    x = 190,509.12

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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.