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Finding the Fourth Proportional to 121,777.80, 182,973.90 and 77,425.80

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Solution

The fourth proportional to 121,777.80, 182,973.90 and 77,425.80 is: 116,334.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,777.80 : 182,973.90 = 77,425.80 : x
  2. Step 2: Convert to fraction form
    121,777.80/182,973.90 = 77,425.80/x
  3. Step 3: Cross multiply
    121,777.80x = 182,973.90 × 77,425.80
  4. Step 4: Simplify right side
    121,777.80x = 14,166,900,586.62
  5. Step 5: Solve for x
    x = 14,166,900,586.62/121,777.80
  6. Step 6: Final answer
    x = 116,334.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.