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Finding the Fourth Proportional to 76,210.60, 105,170.60 and 42,221.30

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Solution

The fourth proportional to 76,210.60, 105,170.60 and 42,221.30 is: 58,265.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,210.60 : 105,170.60 = 42,221.30 : x
  2. Step 2: Convert to fraction form
    76,210.60/105,170.60 = 42,221.30/x
  3. Step 3: Cross multiply
    76,210.60x = 105,170.60 × 42,221.30
  4. Step 4: Simplify right side
    76,210.60x = 4,440,439,033.48
  5. Step 5: Solve for x
    x = 4,440,439,033.48/76,210.60
  6. Step 6: Final answer
    x = 58,265.37

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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.