Home / 103,639.20-143,047.44-67,915.68

Finding the Fourth Proportional to 103,639.20, 143,047.44 and 67,915.68

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Solution

The fourth proportional to 103,639.20, 143,047.44 and 67,915.68 is: 93,740.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.20 : 143,047.44 = 67,915.68 : x
  2. Step 2: Convert to fraction form
    103,639.20/143,047.44 = 67,915.68/x
  3. Step 3: Cross multiply
    103,639.20x = 143,047.44 × 67,915.68
  4. Step 4: Simplify right side
    103,639.20x = 9,715,164,159.86
  5. Step 5: Solve for x
    x = 9,715,164,159.86/103,639.20
  6. Step 6: Final answer
    x = 93,740.25

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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.