Home / 142,395.64-196,501.08-78,732.88

Finding the Fourth Proportional to 142,395.64, 196,501.08 and 78,732.88

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Solution

The fourth proportional to 142,395.64, 196,501.08 and 78,732.88 is: 108,648.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,395.64 : 196,501.08 = 78,732.88 : x
  2. Step 2: Convert to fraction form
    142,395.64/196,501.08 = 78,732.88/x
  3. Step 3: Cross multiply
    142,395.64x = 196,501.08 × 78,732.88
  4. Step 4: Simplify right side
    142,395.64x = 15,471,095,951.51
  5. Step 5: Solve for x
    x = 15,471,095,951.51/142,395.64
  6. Step 6: Final answer
    x = 108,648.66

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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.