Home / 102,450.30-141,380.81-57,128.84

Finding the Fourth Proportional to 102,450.30, 141,380.81 and 57,128.84

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Solution

The fourth proportional to 102,450.30, 141,380.81 and 57,128.84 is: 78,837.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,450.30 : 141,380.81 = 57,128.84 : x
  2. Step 2: Convert to fraction form
    102,450.30/141,380.81 = 57,128.84/x
  3. Step 3: Cross multiply
    102,450.30x = 141,380.81 × 57,128.84
  4. Step 4: Simplify right side
    102,450.30x = 8,076,920,681.01
  5. Step 5: Solve for x
    x = 8,076,920,681.01/102,450.30
  6. Step 6: Final answer
    x = 78,837.45

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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.