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Finding the Fourth Proportional to 85,653.72, 128,484.19 and 26,490.51

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Solution

The fourth proportional to 85,653.72, 128,484.19 and 26,490.51 is: 39,736.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,653.72 : 128,484.19 = 26,490.51 : x
  2. Step 2: Convert to fraction form
    85,653.72/128,484.19 = 26,490.51/x
  3. Step 3: Cross multiply
    85,653.72x = 128,484.19 × 26,490.51
  4. Step 4: Simplify right side
    85,653.72x = 3,403,611,908.79
  5. Step 5: Solve for x
    x = 3,403,611,908.79/85,653.72
  6. Step 6: Final answer
    x = 39,736.88

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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.