Home / 103,780.53-143,220.65-61,375.41

Finding the Fourth Proportional to 103,780.53, 143,220.65 and 61,375.41

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Solution

The fourth proportional to 103,780.53, 143,220.65 and 61,375.41 is: 84,700.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,780.53 : 143,220.65 = 61,375.41 : x
  2. Step 2: Convert to fraction form
    103,780.53/143,220.65 = 61,375.41/x
  3. Step 3: Cross multiply
    103,780.53x = 143,220.65 × 61,375.41
  4. Step 4: Simplify right side
    103,780.53x = 8,790,225,807.34
  5. Step 5: Solve for x
    x = 8,790,225,807.34/103,780.53
  6. Step 6: Final answer
    x = 84,700.14

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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.