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Finding the Fourth Proportional to 76,791.55, 105,980.93 and 42,803.14

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Solution

The fourth proportional to 76,791.55, 105,980.93 and 42,803.14 is: 59,073.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,791.55 : 105,980.93 = 42,803.14 : x
  2. Step 2: Convert to fraction form
    76,791.55/105,980.93 = 42,803.14/x
  3. Step 3: Cross multiply
    76,791.55x = 105,980.93 × 42,803.14
  4. Step 4: Simplify right side
    76,791.55x = 4,536,316,584.12
  5. Step 5: Solve for x
    x = 4,536,316,584.12/76,791.55
  6. Step 6: Final answer
    x = 59,073.12

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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.