Home / 103,084.78-142,172.65-72,558.93

Finding the Fourth Proportional to 103,084.78, 142,172.65 and 72,558.93

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Solution

The fourth proportional to 103,084.78, 142,172.65 and 72,558.93 is: 100,071.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,084.78 : 142,172.65 = 72,558.93 : x
  2. Step 2: Convert to fraction form
    103,084.78/142,172.65 = 72,558.93/x
  3. Step 3: Cross multiply
    103,084.78x = 142,172.65 × 72,558.93
  4. Step 4: Simplify right side
    103,084.78x = 10,315,895,319.44
  5. Step 5: Solve for x
    x = 10,315,895,319.44/103,084.78
  6. Step 6: Final answer
    x = 100,071.95

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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.