Home / 420,642.08-630,968.58-121,127.56

Finding the Fourth Proportional to 420,642.08, 630,968.58 and 121,127.56

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Solution

The fourth proportional to 420,642.08, 630,968.58 and 121,127.56 is: 181,692.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,642.08 : 630,968.58 = 121,127.56 : x
  2. Step 2: Convert to fraction form
    420,642.08/630,968.58 = 121,127.56/x
  3. Step 3: Cross multiply
    420,642.08x = 630,968.58 × 121,127.56
  4. Step 4: Simplify right side
    420,642.08x = 76,427,684,532.06
  5. Step 5: Solve for x
    x = 76,427,684,532.06/420,642.08
  6. Step 6: Final answer
    x = 181,692.91

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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.