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Finding the Fourth Proportional to 85,653.86, 128,480.78 and 26,490.04

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Solution

The fourth proportional to 85,653.86, 128,480.78 and 26,490.04 is: 39,735.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,653.86 : 128,480.78 = 26,490.04 : x
  2. Step 2: Convert to fraction form
    85,653.86/128,480.78 = 26,490.04/x
  3. Step 3: Cross multiply
    85,653.86x = 128,480.78 × 26,490.04
  4. Step 4: Simplify right side
    85,653.86x = 3,403,460,746.45
  5. Step 5: Solve for x
    x = 3,403,460,746.45/85,653.86
  6. Step 6: Final answer
    x = 39,735.06

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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.