Home / 145,172.64-217,686.96-85,215.36

Finding the Fourth Proportional to 145,172.64, 217,686.96 and 85,215.36

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Solution

The fourth proportional to 145,172.64, 217,686.96 and 85,215.36 is: 127,780.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,172.64 : 217,686.96 = 85,215.36 : x
  2. Step 2: Convert to fraction form
    145,172.64/217,686.96 = 85,215.36/x
  3. Step 3: Cross multiply
    145,172.64x = 217,686.96 × 85,215.36
  4. Step 4: Simplify right side
    145,172.64x = 18,550,272,663.71
  5. Step 5: Solve for x
    x = 18,550,272,663.71/145,172.64
  6. Step 6: Final answer
    x = 127,780.78

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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.