Home / 86,934,138.60-130,401,207.90-85,658,680.20

Finding the Fourth Proportional to 86,934,138.60, 130,401,207.90 and 85,658,680.20

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Solution

The fourth proportional to 86,934,138.60, 130,401,207.90 and 85,658,680.20 is: 128,488,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,934,138.60 : 130,401,207.90 = 85,658,680.20 : x
  2. Step 2: Convert to fraction form
    86,934,138.60/130,401,207.90 = 85,658,680.20/x
  3. Step 3: Cross multiply
    86,934,138.60x = 130,401,207.90 × 85,658,680.20
  4. Step 4: Simplify right side
    86,934,138.60x = 11,169,995,365,199,814
  5. Step 5: Solve for x
    x = 11,169,995,365,199,814/86,934,138.60
  6. Step 6: Final answer
    x = 128,488,020.30

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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.