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Finding the Fourth Proportional to 85,670.73, 128,429.77 and 40,664.32

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Solution

The fourth proportional to 85,670.73, 128,429.77 and 40,664.32 is: 60,960.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,670.73 : 128,429.77 = 40,664.32 : x
  2. Step 2: Convert to fraction form
    85,670.73/128,429.77 = 40,664.32/x
  3. Step 3: Cross multiply
    85,670.73x = 128,429.77 × 40,664.32
  4. Step 4: Simplify right side
    85,670.73x = 5,222,509,264.81
  5. Step 5: Solve for x
    x = 5,222,509,264.81/85,670.73
  6. Step 6: Final answer
    x = 60,960.25

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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.