Home / 145,128.80-217,615.20-51,622.40

Finding the Fourth Proportional to 145,128.80, 217,615.20 and 51,622.40

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Solution

The fourth proportional to 145,128.80, 217,615.20 and 51,622.40 is: 77,405.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,128.80 : 217,615.20 = 51,622.40 : x
  2. Step 2: Convert to fraction form
    145,128.80/217,615.20 = 51,622.40/x
  3. Step 3: Cross multiply
    145,128.80x = 217,615.20 × 51,622.40
  4. Step 4: Simplify right side
    145,128.80x = 11,233,818,900.48
  5. Step 5: Solve for x
    x = 11,233,818,900.48/145,128.80
  6. Step 6: Final answer
    x = 77,405.86

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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.