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Finding the Fourth Proportional to 85,561.65, 128,235.56 and 59,055.21

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Solution

The fourth proportional to 85,561.65, 128,235.56 and 59,055.21 is: 88,509.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,561.65 : 128,235.56 = 59,055.21 : x
  2. Step 2: Convert to fraction form
    85,561.65/128,235.56 = 59,055.21/x
  3. Step 3: Cross multiply
    85,561.65x = 128,235.56 × 59,055.21
  4. Step 4: Simplify right side
    85,561.65x = 7,572,977,629.99
  5. Step 5: Solve for x
    x = 7,572,977,629.99/85,561.65
  6. Step 6: Final answer
    x = 88,509.02

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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.