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Finding the Fourth Proportional to 145,780.80, 218,606.40 and 57,004.80

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Solution

The fourth proportional to 145,780.80, 218,606.40 and 57,004.80 is: 85,481.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,780.80 : 218,606.40 = 57,004.80 : x
  2. Step 2: Convert to fraction form
    145,780.80/218,606.40 = 57,004.80/x
  3. Step 3: Cross multiply
    145,780.80x = 218,606.40 × 57,004.80
  4. Step 4: Simplify right side
    145,780.80x = 12,461,614,110.72
  5. Step 5: Solve for x
    x = 12,461,614,110.72/145,780.80
  6. Step 6: Final answer
    x = 85,481.86

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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.