Home / 420,723,713.72-631,153,383.96-129,590,701.08

Finding the Fourth Proportional to 420,723,713.72, 631,153,383.96 and 129,590,701.08

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Solution

The fourth proportional to 420,723,713.72, 631,153,383.96 and 129,590,701.08 is: 194,406,939.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,723,713.72 : 631,153,383.96 = 129,590,701.08 : x
  2. Step 2: Convert to fraction form
    420,723,713.72/631,153,383.96 = 129,590,701.08/x
  3. Step 3: Cross multiply
    420,723,713.72x = 631,153,383.96 × 129,590,701.08
  4. Step 4: Simplify right side
    420,723,713.72x = 81,791,609,516,390,832
  5. Step 5: Solve for x
    x = 81,791,609,516,390,832/420,723,713.72
  6. Step 6: Final answer
    x = 194,406,939.40

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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.