Home / 142,101.08-196,098.81-78,438.32

Finding the Fourth Proportional to 142,101.08, 196,098.81 and 78,438.32

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Solution

The fourth proportional to 142,101.08, 196,098.81 and 78,438.32 is: 108,244.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,101.08 : 196,098.81 = 78,438.32 : x
  2. Step 2: Convert to fraction form
    142,101.08/196,098.81 = 78,438.32/x
  3. Step 3: Cross multiply
    142,101.08x = 196,098.81 × 78,438.32
  4. Step 4: Simplify right side
    142,101.08x = 15,381,661,210.40
  5. Step 5: Solve for x
    x = 15,381,661,210.40/142,101.08
  6. Step 6: Final answer
    x = 108,244.51

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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.