Home / 387,096.72-580,547.64-137,720.40

Finding the Fourth Proportional to 387,096.72, 580,547.64 and 137,720.40

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Solution

The fourth proportional to 387,096.72, 580,547.64 and 137,720.40 is: 206,545.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,096.72 : 580,547.64 = 137,720.40 : x
  2. Step 2: Convert to fraction form
    387,096.72/580,547.64 = 137,720.40/x
  3. Step 3: Cross multiply
    387,096.72x = 580,547.64 × 137,720.40
  4. Step 4: Simplify right side
    387,096.72x = 79,953,253,199.86
  5. Step 5: Solve for x
    x = 79,953,253,199.86/387,096.72
  6. Step 6: Final answer
    x = 206,545.93

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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.