Home / 142,154.07-196,170.05-78,490.50

Finding the Fourth Proportional to 142,154.07, 196,170.05 and 78,490.50

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Solution

The fourth proportional to 142,154.07, 196,170.05 and 78,490.50 is: 108,315.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,154.07 : 196,170.05 = 78,490.50 : x
  2. Step 2: Convert to fraction form
    142,154.07/196,170.05 = 78,490.50/x
  3. Step 3: Cross multiply
    142,154.07x = 196,170.05 × 78,490.50
  4. Step 4: Simplify right side
    142,154.07x = 15,397,484,917.07
  5. Step 5: Solve for x
    x = 15,397,484,917.07/142,154.07
  6. Step 6: Final answer
    x = 108,315.47

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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.