Home / 103,705.25-143,121.12-62,881.25

Finding the Fourth Proportional to 103,705.25, 143,121.12 and 62,881.25

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Solution

The fourth proportional to 103,705.25, 143,121.12 and 62,881.25 is: 86,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,705.25 : 143,121.12 = 62,881.25 : x
  2. Step 2: Convert to fraction form
    103,705.25/143,121.12 = 62,881.25/x
  3. Step 3: Cross multiply
    103,705.25x = 143,121.12 × 62,881.25
  4. Step 4: Simplify right side
    103,705.25x = 8,999,634,927
  5. Step 5: Solve for x
    x = 8,999,634,927/103,705.25
  6. Step 6: Final answer
    x = 86,780.90

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1.5x scale

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.