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Finding the Fourth Proportional to 85,370.80, 128,056.20 and 29,966.80

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Solution

The fourth proportional to 85,370.80, 128,056.20 and 29,966.80 is: 44,950.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,370.80 : 128,056.20 = 29,966.80 : x
  2. Step 2: Convert to fraction form
    85,370.80/128,056.20 = 29,966.80/x
  3. Step 3: Cross multiply
    85,370.80x = 128,056.20 × 29,966.80
  4. Step 4: Simplify right side
    85,370.80x = 3,837,434,534.16
  5. Step 5: Solve for x
    x = 3,837,434,534.16/85,370.80
  6. Step 6: Final answer
    x = 44,950.20

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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.