Home / 142,278.08-196,345.50-78,615.32

Finding the Fourth Proportional to 142,278.08, 196,345.50 and 78,615.32

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Solution

The fourth proportional to 142,278.08, 196,345.50 and 78,615.32 is: 108,490.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,278.08 : 196,345.50 = 78,615.32 : x
  2. Step 2: Convert to fraction form
    142,278.08/196,345.50 = 78,615.32/x
  3. Step 3: Cross multiply
    142,278.08x = 196,345.50 × 78,615.32
  4. Step 4: Simplify right side
    142,278.08x = 15,435,764,313.06
  5. Step 5: Solve for x
    x = 15,435,764,313.06/142,278.08
  6. Step 6: Final answer
    x = 108,490.11

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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.