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Finding the Fourth Proportional to 85,663.63, 128,426.19 and 35,781.94

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Solution

The fourth proportional to 85,663.63, 128,426.19 and 35,781.94 is: 53,643.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,663.63 : 128,426.19 = 35,781.94 : x
  2. Step 2: Convert to fraction form
    85,663.63/128,426.19 = 35,781.94/x
  3. Step 3: Cross multiply
    85,663.63x = 128,426.19 × 35,781.94
  4. Step 4: Simplify right side
    85,663.63x = 4,595,338,225.01
  5. Step 5: Solve for x
    x = 4,595,338,225.01/85,663.63
  6. Step 6: Final answer
    x = 53,643.98

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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.