Home / 142,929.36-197,239.05-78,399.45

Finding the Fourth Proportional to 142,929.36, 197,239.05 and 78,399.45

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Solution

The fourth proportional to 142,929.36, 197,239.05 and 78,399.45 is: 108,189.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,929.36 : 197,239.05 = 78,399.45 : x
  2. Step 2: Convert to fraction form
    142,929.36/197,239.05 = 78,399.45/x
  3. Step 3: Cross multiply
    142,929.36x = 197,239.05 × 78,399.45
  4. Step 4: Simplify right side
    142,929.36x = 15,463,433,038.52
  5. Step 5: Solve for x
    x = 15,463,433,038.52/142,929.36
  6. Step 6: Final answer
    x = 108,189.34

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1.5x scale

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.