Home / 105,129.23-145,081.13-57,385.80

Finding the Fourth Proportional to 105,129.23, 145,081.13 and 57,385.80

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Solution

The fourth proportional to 105,129.23, 145,081.13 and 57,385.80 is: 79,193.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,129.23 : 145,081.13 = 57,385.80 : x
  2. Step 2: Convert to fraction form
    105,129.23/145,081.13 = 57,385.80/x
  3. Step 3: Cross multiply
    105,129.23x = 145,081.13 × 57,385.80
  4. Step 4: Simplify right side
    105,129.23x = 8,325,596,423.03
  5. Step 5: Solve for x
    x = 8,325,596,423.03/105,129.23
  6. Step 6: Final answer
    x = 79,193.93

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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.