Home / 78,000.53-107,640.33-42,190.45

Finding the Fourth Proportional to 78,000.53, 107,640.33 and 42,190.45

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Solution

The fourth proportional to 78,000.53, 107,640.33 and 42,190.45 is: 58,222.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,000.53 : 107,640.33 = 42,190.45 : x
  2. Step 2: Convert to fraction form
    78,000.53/107,640.33 = 42,190.45/x
  3. Step 3: Cross multiply
    78,000.53x = 107,640.33 × 42,190.45
  4. Step 4: Simplify right side
    78,000.53x = 4,541,393,211.69
  5. Step 5: Solve for x
    x = 4,541,393,211.69/78,000.53
  6. Step 6: Final answer
    x = 58,222.59

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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.