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Finding the Fourth Proportional to 84,814.70, 127,141.05 and 31,492.40

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Solution

The fourth proportional to 84,814.70, 127,141.05 and 31,492.40 is: 47,208.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,814.70 : 127,141.05 = 31,492.40 : x
  2. Step 2: Convert to fraction form
    84,814.70/127,141.05 = 31,492.40/x
  3. Step 3: Cross multiply
    84,814.70x = 127,141.05 × 31,492.40
  4. Step 4: Simplify right side
    84,814.70x = 4,003,976,803.02
  5. Step 5: Solve for x
    x = 4,003,976,803.02/84,814.70
  6. Step 6: Final answer
    x = 47,208.52

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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.