Home / 86,328,028.70-129,492,043.05-85,824,143.90

Finding the Fourth Proportional to 86,328,028.70, 129,492,043.05 and 85,824,143.90

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Solution

The fourth proportional to 86,328,028.70, 129,492,043.05 and 85,824,143.90 is: 128,736,215.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,328,028.70 : 129,492,043.05 = 85,824,143.90 : x
  2. Step 2: Convert to fraction form
    86,328,028.70/129,492,043.05 = 85,824,143.90/x
  3. Step 3: Cross multiply
    86,328,028.70x = 129,492,043.05 × 85,824,143.90
  4. Step 4: Simplify right side
    86,328,028.70x = 11,113,543,736,628,196
  5. Step 5: Solve for x
    x = 11,113,543,736,628,196/86,328,028.70
  6. Step 6: Final answer
    x = 128,736,215.85

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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.