Home / 142,140.39-196,156.80-78,482.22

Finding the Fourth Proportional to 142,140.39, 196,156.80 and 78,482.22

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Solution

The fourth proportional to 142,140.39, 196,156.80 and 78,482.22 is: 108,307.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,140.39 : 196,156.80 = 78,482.22 : x
  2. Step 2: Convert to fraction form
    142,140.39/196,156.80 = 78,482.22/x
  3. Step 3: Cross multiply
    142,140.39x = 196,156.80 × 78,482.22
  4. Step 4: Simplify right side
    142,140.39x = 15,394,821,132.10
  5. Step 5: Solve for x
    x = 15,394,821,132.10/142,140.39
  6. Step 6: Final answer
    x = 108,307.15

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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.