Home / 143,035.49-197,391.48-78,510.76

Finding the Fourth Proportional to 143,035.49, 197,391.48 and 78,510.76

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Solution

The fourth proportional to 143,035.49, 197,391.48 and 78,510.76 is: 108,346.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,035.49 : 197,391.48 = 78,510.76 : x
  2. Step 2: Convert to fraction form
    143,035.49/197,391.48 = 78,510.76/x
  3. Step 3: Cross multiply
    143,035.49x = 197,391.48 × 78,510.76
  4. Step 4: Simplify right side
    143,035.49x = 15,497,354,719.77
  5. Step 5: Solve for x
    x = 15,497,354,719.77/143,035.49
  6. Step 6: Final answer
    x = 108,346.22

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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.