Home / 143,018.28-197,365.14-78,487.92

Finding the Fourth Proportional to 143,018.28, 197,365.14 and 78,487.92

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Solution

The fourth proportional to 143,018.28, 197,365.14 and 78,487.92 is: 108,313.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,018.28 : 197,365.14 = 78,487.92 : x
  2. Step 2: Convert to fraction form
    143,018.28/197,365.14 = 78,487.92/x
  3. Step 3: Cross multiply
    143,018.28x = 197,365.14 × 78,487.92
  4. Step 4: Simplify right side
    143,018.28x = 15,490,779,319.11
  5. Step 5: Solve for x
    x = 15,490,779,319.11/143,018.28
  6. Step 6: Final answer
    x = 108,313.28

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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.