Home / 142,790.36-197,055.78-86,190.68

Finding the Fourth Proportional to 142,790.36, 197,055.78 and 86,190.68

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Solution

The fourth proportional to 142,790.36, 197,055.78 and 86,190.68 is: 118,946.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,790.36 : 197,055.78 = 86,190.68 : x
  2. Step 2: Convert to fraction form
    142,790.36/197,055.78 = 86,190.68/x
  3. Step 3: Cross multiply
    142,790.36x = 197,055.78 × 86,190.68
  4. Step 4: Simplify right side
    142,790.36x = 16,984,371,676.13
  5. Step 5: Solve for x
    x = 16,984,371,676.13/142,790.36
  6. Step 6: Final answer
    x = 118,946.21

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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.