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Finding the Fourth Proportional to 85,295.70, 127,931.40 and 29,138.40

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Solution

The fourth proportional to 85,295.70, 127,931.40 and 29,138.40 is: 43,703.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,295.70 : 127,931.40 = 29,138.40 : x
  2. Step 2: Convert to fraction form
    85,295.70/127,931.40 = 29,138.40/x
  3. Step 3: Cross multiply
    85,295.70x = 127,931.40 × 29,138.40
  4. Step 4: Simplify right side
    85,295.70x = 3,727,716,305.76
  5. Step 5: Solve for x
    x = 3,727,716,305.76/85,295.70
  6. Step 6: Final answer
    x = 43,703.45

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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.