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Finding the Fourth Proportional to 85,666.80, 128,506.70 and 26,508.45

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Solution

The fourth proportional to 85,666.80, 128,506.70 and 26,508.45 is: 39,764.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,666.80 : 128,506.70 = 26,508.45 : x
  2. Step 2: Convert to fraction form
    85,666.80/128,506.70 = 26,508.45/x
  3. Step 3: Cross multiply
    85,666.80x = 128,506.70 × 26,508.45
  4. Step 4: Simplify right side
    85,666.80x = 3,406,513,431.62
  5. Step 5: Solve for x
    x = 3,406,513,431.62/85,666.80
  6. Step 6: Final answer
    x = 39,764.69

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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.