Home / 142,368.12-196,477.92-78,711.84

Finding the Fourth Proportional to 142,368.12, 196,477.92 and 78,711.84

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Solution

The fourth proportional to 142,368.12, 196,477.92 and 78,711.84 is: 108,627.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,368.12 : 196,477.92 = 78,711.84 : x
  2. Step 2: Convert to fraction form
    142,368.12/196,477.92 = 78,711.84/x
  3. Step 3: Cross multiply
    142,368.12x = 196,477.92 × 78,711.84
  4. Step 4: Simplify right side
    142,368.12x = 15,465,138,602.57
  5. Step 5: Solve for x
    x = 15,465,138,602.57/142,368.12
  6. Step 6: Final answer
    x = 108,627.82

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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.