Home / 157,829.10-217,809.39-86,215.80

Finding the Fourth Proportional to 157,829.10, 217,809.39 and 86,215.80

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Solution

The fourth proportional to 157,829.10, 217,809.39 and 86,215.80 is: 118,980.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,829.10 : 217,809.39 = 86,215.80 : x
  2. Step 2: Convert to fraction form
    157,829.10/217,809.39 = 86,215.80/x
  3. Step 3: Cross multiply
    157,829.10x = 217,809.39 × 86,215.80
  4. Step 4: Simplify right side
    157,829.10x = 18,778,610,806.36
  5. Step 5: Solve for x
    x = 18,778,610,806.36/157,829.10
  6. Step 6: Final answer
    x = 118,980.66

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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.