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Finding the Fourth Proportional to 85,501.29, 128,140.11 and 45,973.29

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Solution

The fourth proportional to 85,501.29, 128,140.11 and 45,973.29 is: 68,899.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,501.29 : 128,140.11 = 45,973.29 : x
  2. Step 2: Convert to fraction form
    85,501.29/128,140.11 = 45,973.29/x
  3. Step 3: Cross multiply
    85,501.29x = 128,140.11 × 45,973.29
  4. Step 4: Simplify right side
    85,501.29x = 5,891,022,437.66
  5. Step 5: Solve for x
    x = 5,891,022,437.66/85,501.29
  6. Step 6: Final answer
    x = 68,899.81

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1.5x scale

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.