Home / 206,861,329.40-310,267,110.90-85,680,145.40

Finding the Fourth Proportional to 206,861,329.40, 310,267,110.90 and 85,680,145.40

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Solution

The fourth proportional to 206,861,329.40, 310,267,110.90 and 85,680,145.40 is: 128,509,911.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,861,329.40 : 310,267,110.90 = 85,680,145.40 : x
  2. Step 2: Convert to fraction form
    206,861,329.40/310,267,110.90 = 85,680,145.40/x
  3. Step 3: Cross multiply
    206,861,329.40x = 310,267,110.90 × 85,680,145.40
  4. Step 4: Simplify right side
    206,861,329.40x = 26,583,731,174,749,924
  5. Step 5: Solve for x
    x = 26,583,731,174,749,924/206,861,329.40
  6. Step 6: Final answer
    x = 128,509,911.70

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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.