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Finding the Fourth Proportional to 76,670.52, 105,809.28 and 42,679.08

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Solution

The fourth proportional to 76,670.52, 105,809.28 and 42,679.08 is: 58,899.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,670.52 : 105,809.28 = 42,679.08 : x
  2. Step 2: Convert to fraction form
    76,670.52/105,809.28 = 42,679.08/x
  3. Step 3: Cross multiply
    76,670.52x = 105,809.28 × 42,679.08
  4. Step 4: Simplify right side
    76,670.52x = 4,515,842,725.86
  5. Step 5: Solve for x
    x = 4,515,842,725.86/76,670.52
  6. Step 6: Final answer
    x = 58,899.34

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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.