Home / 420,100.13-630,243.88-120,557.36

Finding the Fourth Proportional to 420,100.13, 630,243.88 and 120,557.36

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Solution

The fourth proportional to 420,100.13, 630,243.88 and 120,557.36 is: 180,862.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,100.13 : 630,243.88 = 120,557.36 : x
  2. Step 2: Convert to fraction form
    420,100.13/630,243.88 = 120,557.36/x
  3. Step 3: Cross multiply
    420,100.13x = 630,243.88 × 120,557.36
  4. Step 4: Simplify right side
    420,100.13x = 75,980,539,603.17
  5. Step 5: Solve for x
    x = 75,980,539,603.17/420,100.13
  6. Step 6: Final answer
    x = 180,862.93

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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.