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Finding the Fourth Proportional to 85,490.64, 128,235.96 and 23,159.52

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Solution

The fourth proportional to 85,490.64, 128,235.96 and 23,159.52 is: 34,739.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,490.64 : 128,235.96 = 23,159.52 : x
  2. Step 2: Convert to fraction form
    85,490.64/128,235.96 = 23,159.52/x
  3. Step 3: Cross multiply
    85,490.64x = 128,235.96 × 23,159.52
  4. Step 4: Simplify right side
    85,490.64x = 2,969,883,280.34
  5. Step 5: Solve for x
    x = 2,969,883,280.34/85,490.64
  6. Step 6: Final answer
    x = 34,739.28

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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.