Home / 142,881.47-197,172.33-78,349.48

Finding the Fourth Proportional to 142,881.47, 197,172.33 and 78,349.48

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Solution

The fourth proportional to 142,881.47, 197,172.33 and 78,349.48 is: 108,120.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,881.47 : 197,172.33 = 78,349.48 : x
  2. Step 2: Convert to fraction form
    142,881.47/197,172.33 = 78,349.48/x
  3. Step 3: Cross multiply
    142,881.47x = 197,172.33 × 78,349.48
  4. Step 4: Simplify right side
    142,881.47x = 15,448,348,739.15
  5. Step 5: Solve for x
    x = 15,448,348,739.15/142,881.47
  6. Step 6: Final answer
    x = 108,120.03

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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.