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Finding the Fourth Proportional to 245,500.74, 338,787.75 and 138,070.77

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Solution

The fourth proportional to 245,500.74, 338,787.75 and 138,070.77 is: 190,535.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,500.74 : 338,787.75 = 138,070.77 : x
  2. Step 2: Convert to fraction form
    245,500.74/338,787.75 = 138,070.77/x
  3. Step 3: Cross multiply
    245,500.74x = 338,787.75 × 138,070.77
  4. Step 4: Simplify right side
    245,500.74x = 46,776,685,509.07
  5. Step 5: Solve for x
    x = 46,776,685,509.07/245,500.74
  6. Step 6: Final answer
    x = 190,535.82

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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.