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Finding the Fourth Proportional to 85,679.51, 128,525.27 and 26,507.39

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Solution

The fourth proportional to 85,679.51, 128,525.27 and 26,507.39 is: 39,762.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,679.51 : 128,525.27 = 26,507.39 : x
  2. Step 2: Convert to fraction form
    85,679.51/128,525.27 = 26,507.39/x
  3. Step 3: Cross multiply
    85,679.51x = 128,525.27 × 26,507.39
  4. Step 4: Simplify right side
    85,679.51x = 3,406,868,681.58
  5. Step 5: Solve for x
    x = 3,406,868,681.58/85,679.51
  6. Step 6: Final answer
    x = 39,762.94

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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.