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Finding the Fourth Proportional to 76,710.90, 105,862.23 and 43,176.90

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Solution

The fourth proportional to 76,710.90, 105,862.23 and 43,176.90 is: 59,584.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,710.90 : 105,862.23 = 43,176.90 : x
  2. Step 2: Convert to fraction form
    76,710.90/105,862.23 = 43,176.90/x
  3. Step 3: Cross multiply
    76,710.90x = 105,862.23 × 43,176.90
  4. Step 4: Simplify right side
    76,710.90x = 4,570,802,918.49
  5. Step 5: Solve for x
    x = 4,570,802,918.49/76,710.90
  6. Step 6: Final answer
    x = 59,584.79

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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.