Home / 81,869,931.72-122,609,117.34-47,221,297.20

Finding the Fourth Proportional to 81,869,931.72, 122,609,117.34 and 47,221,297.20

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Solution

The fourth proportional to 81,869,931.72, 122,609,117.34 and 47,221,297.20 is: 70,719,022.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,869,931.72 : 122,609,117.34 = 47,221,297.20 : x
  2. Step 2: Convert to fraction form
    81,869,931.72/122,609,117.34 = 47,221,297.20/x
  3. Step 3: Cross multiply
    81,869,931.72x = 122,609,117.34 × 47,221,297.20
  4. Step 4: Simplify right side
    81,869,931.72x = 5,789,761,569,341,814
  5. Step 5: Solve for x
    x = 5,789,761,569,341,814/81,869,931.72
  6. Step 6: Final answer
    x = 70,719,022.82

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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.