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Finding the Fourth Proportional to 85,595.62, 128,344.02 and 26,415.40

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Solution

The fourth proportional to 85,595.62, 128,344.02 and 26,415.40 is: 39,607.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,595.62 : 128,344.02 = 26,415.40 : x
  2. Step 2: Convert to fraction form
    85,595.62/128,344.02 = 26,415.40/x
  3. Step 3: Cross multiply
    85,595.62x = 128,344.02 × 26,415.40
  4. Step 4: Simplify right side
    85,595.62x = 3,390,258,625.91
  5. Step 5: Solve for x
    x = 3,390,258,625.91/85,595.62
  6. Step 6: Final answer
    x = 39,607.85

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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.