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Finding the Fourth Proportional to 85,900.80, 128,899.80 and 59,624.40

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Solution

The fourth proportional to 85,900.80, 128,899.80 and 59,624.40 is: 89,470.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,900.80 : 128,899.80 = 59,624.40 : x
  2. Step 2: Convert to fraction form
    85,900.80/128,899.80 = 59,624.40/x
  3. Step 3: Cross multiply
    85,900.80x = 128,899.80 × 59,624.40
  4. Step 4: Simplify right side
    85,900.80x = 7,685,573,235.12
  5. Step 5: Solve for x
    x = 7,685,573,235.12/85,900.80
  6. Step 6: Final answer
    x = 89,470.33

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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.