Home / 142,769.40-197,021.58-79,111.32

Finding the Fourth Proportional to 142,769.40, 197,021.58 and 79,111.32

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Solution

The fourth proportional to 142,769.40, 197,021.58 and 79,111.32 is: 109,173.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,769.40 : 197,021.58 = 79,111.32 : x
  2. Step 2: Convert to fraction form
    142,769.40/197,021.58 = 79,111.32/x
  3. Step 3: Cross multiply
    142,769.40x = 197,021.58 × 79,111.32
  4. Step 4: Simplify right side
    142,769.40x = 15,586,637,262.29
  5. Step 5: Solve for x
    x = 15,586,637,262.29/142,769.40
  6. Step 6: Final answer
    x = 109,173.52

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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.