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Finding the Fourth Proportional to 76,287.94, 105,279.86 and 42,299.60

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Solution

The fourth proportional to 76,287.94, 105,279.86 and 42,299.60 is: 58,374.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,287.94 : 105,279.86 = 42,299.60 : x
  2. Step 2: Convert to fraction form
    76,287.94/105,279.86 = 42,299.60/x
  3. Step 3: Cross multiply
    76,287.94x = 105,279.86 × 42,299.60
  4. Step 4: Simplify right side
    76,287.94x = 4,453,295,966.06
  5. Step 5: Solve for x
    x = 4,453,295,966.06/76,287.94
  6. Step 6: Final answer
    x = 58,374.84

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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.