Home / 142,143.06-196,159.95-78,477.06

Finding the Fourth Proportional to 142,143.06, 196,159.95 and 78,477.06

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Solution

The fourth proportional to 142,143.06, 196,159.95 and 78,477.06 is: 108,299.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,143.06 : 196,159.95 = 78,477.06 : x
  2. Step 2: Convert to fraction form
    142,143.06/196,159.95 = 78,477.06/x
  3. Step 3: Cross multiply
    142,143.06x = 196,159.95 × 78,477.06
  4. Step 4: Simplify right side
    142,143.06x = 15,394,056,165.75
  5. Step 5: Solve for x
    x = 15,394,056,165.75/142,143.06
  6. Step 6: Final answer
    x = 108,299.74

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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.