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Finding the Fourth Proportional to 85,501, 128,265.28 and 26,336.64

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Solution

The fourth proportional to 85,501, 128,265.28 and 26,336.64 is: 39,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,501 : 128,265.28 = 26,336.64 : x
  2. Step 2: Convert to fraction form
    85,501/128,265.28 = 26,336.64/x
  3. Step 3: Cross multiply
    85,501x = 128,265.28 × 26,336.64
  4. Step 4: Simplify right side
    85,501x = 3,378,076,503.86
  5. Step 5: Solve for x
    x = 3,378,076,503.86/85,501
  6. Step 6: Final answer
    x = 39,509.20

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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.