Home / 286,629.20-429,943.80-99,640.70

Finding the Fourth Proportional to 286,629.20, 429,943.80 and 99,640.70

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Solution

The fourth proportional to 286,629.20, 429,943.80 and 99,640.70 is: 149,461.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,629.20 : 429,943.80 = 99,640.70 : x
  2. Step 2: Convert to fraction form
    286,629.20/429,943.80 = 99,640.70/x
  3. Step 3: Cross multiply
    286,629.20x = 429,943.80 × 99,640.70
  4. Step 4: Simplify right side
    286,629.20x = 42,839,901,192.66
  5. Step 5: Solve for x
    x = 42,839,901,192.66/286,629.20
  6. Step 6: Final answer
    x = 149,461.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.