Home / 420,345,505.80-630,578,430.24-129,237,068.04

Finding the Fourth Proportional to 420,345,505.80, 630,578,430.24 and 129,237,068.04

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Solution

The fourth proportional to 420,345,505.80, 630,578,430.24 and 129,237,068.04 is: 193,874,102.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,345,505.80 : 630,578,430.24 = 129,237,068.04 : x
  2. Step 2: Convert to fraction form
    420,345,505.80/630,578,430.24 = 129,237,068.04/x
  3. Step 3: Cross multiply
    420,345,505.80x = 630,578,430.24 × 129,237,068.04
  4. Step 4: Simplify right side
    420,345,505.80x = 81,494,107,493,483,280
  5. Step 5: Solve for x
    x = 81,494,107,493,483,280/420,345,505.80
  6. Step 6: Final answer
    x = 193,874,102.06

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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.