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Finding the Fourth Proportional to 85,645.58, 128,472.01 and 26,482.37

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Solution

The fourth proportional to 85,645.58, 128,472.01 and 26,482.37 is: 39,724.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,645.58 : 128,472.01 = 26,482.37 : x
  2. Step 2: Convert to fraction form
    85,645.58/128,472.01 = 26,482.37/x
  3. Step 3: Cross multiply
    85,645.58x = 128,472.01 × 26,482.37
  4. Step 4: Simplify right side
    85,645.58x = 3,402,242,594.90
  5. Step 5: Solve for x
    x = 3,402,242,594.90/85,645.58
  6. Step 6: Final answer
    x = 39,724.67

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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.