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Finding the Fourth Proportional to 103,303.61, 154,623.21 and 53,315.61

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Solution

The fourth proportional to 103,303.61, 154,623.21 and 53,315.61 is: 79,801.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,303.61 : 154,623.21 = 53,315.61 : x
  2. Step 2: Convert to fraction form
    103,303.61/154,623.21 = 53,315.61/x
  3. Step 3: Cross multiply
    103,303.61x = 154,623.21 × 53,315.61
  4. Step 4: Simplify right side
    103,303.61x = 8,243,830,761.31
  5. Step 5: Solve for x
    x = 8,243,830,761.31/103,303.61
  6. Step 6: Final answer
    x = 79,801.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.