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Finding the Fourth Proportional to 158,329.90, 218,491.00 and 90,345.65

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Solution

The fourth proportional to 158,329.90, 218,491.00 and 90,345.65 is: 124,674.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,329.90 : 218,491.00 = 90,345.65 : x
  2. Step 2: Convert to fraction form
    158,329.90/218,491.00 = 90,345.65/x
  3. Step 3: Cross multiply
    158,329.90x = 218,491.00 × 90,345.65
  4. Step 4: Simplify right side
    158,329.90x = 19,739,710,095.83
  5. Step 5: Solve for x
    x = 19,739,710,095.83/158,329.90
  6. Step 6: Final answer
    x = 124,674.56

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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.