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Finding the Fourth Proportional to 85,392.14, 128,000.70 and 35,501.18

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Solution

The fourth proportional to 85,392.14, 128,000.70 and 35,501.18 is: 53,215.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,392.14 : 128,000.70 = 35,501.18 : x
  2. Step 2: Convert to fraction form
    85,392.14/128,000.70 = 35,501.18/x
  3. Step 3: Cross multiply
    85,392.14x = 128,000.70 × 35,501.18
  4. Step 4: Simplify right side
    85,392.14x = 4,544,175,890.83
  5. Step 5: Solve for x
    x = 4,544,175,890.83/85,392.14
  6. Step 6: Final answer
    x = 53,215.39

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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.