Home / 105,020.40-157,530.60-57,781.20

Finding the Fourth Proportional to 105,020.40, 157,530.60 and 57,781.20

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Solution

The fourth proportional to 105,020.40, 157,530.60 and 57,781.20 is: 86,671.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,020.40 : 157,530.60 = 57,781.20 : x
  2. Step 2: Convert to fraction form
    105,020.40/157,530.60 = 57,781.20/x
  3. Step 3: Cross multiply
    105,020.40x = 157,530.60 × 57,781.20
  4. Step 4: Simplify right side
    105,020.40x = 9,102,307,104.72
  5. Step 5: Solve for x
    x = 9,102,307,104.72/105,020.40
  6. Step 6: Final answer
    x = 86,671.80

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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.