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Finding the Fourth Proportional to 85,607.64, 128,427.87 and 26,441.10

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Solution

The fourth proportional to 85,607.64, 128,427.87 and 26,441.10 is: 39,666.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,607.64 : 128,427.87 = 26,441.10 : x
  2. Step 2: Convert to fraction form
    85,607.64/128,427.87 = 26,441.10/x
  3. Step 3: Cross multiply
    85,607.64x = 128,427.87 × 26,441.10
  4. Step 4: Simplify right side
    85,607.64x = 3,395,774,153.46
  5. Step 5: Solve for x
    x = 3,395,774,153.46/85,607.64
  6. Step 6: Final answer
    x = 39,666.72

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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.