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Finding the Fourth Proportional to 245,415.61, 338,669.47 and 136,518.65

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Solution

The fourth proportional to 245,415.61, 338,669.47 and 136,518.65 is: 188,393.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,415.61 : 338,669.47 = 136,518.65 : x
  2. Step 2: Convert to fraction form
    245,415.61/338,669.47 = 136,518.65/x
  3. Step 3: Cross multiply
    245,415.61x = 338,669.47 × 136,518.65
  4. Step 4: Simplify right side
    245,415.61x = 46,234,697,617.41
  5. Step 5: Solve for x
    x = 46,234,697,617.41/245,415.61
  6. Step 6: Final answer
    x = 188,393.46

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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.