Home / 85,985.82-128,975.22-43,864.98

Finding the Fourth Proportional to 85,985.82, 128,975.22 and 43,864.98

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Solution

The fourth proportional to 85,985.82, 128,975.22 and 43,864.98 is: 65,795.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,985.82 : 128,975.22 = 43,864.98 : x
  2. Step 2: Convert to fraction form
    85,985.82/128,975.22 = 43,864.98/x
  3. Step 3: Cross multiply
    85,985.82x = 128,975.22 × 43,864.98
  4. Step 4: Simplify right side
    85,985.82x = 5,657,494,962.14
  5. Step 5: Solve for x
    x = 5,657,494,962.14/85,985.82
  6. Step 6: Final answer
    x = 65,795.67

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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.