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Finding the Fourth Proportional to 86,638.40, 130,000.80 and 49,227.20

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Solution

The fourth proportional to 86,638.40, 130,000.80 and 49,227.20 is: 73,865.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,638.40 : 130,000.80 = 49,227.20 : x
  2. Step 2: Convert to fraction form
    86,638.40/130,000.80 = 49,227.20/x
  3. Step 3: Cross multiply
    86,638.40x = 130,000.80 × 49,227.20
  4. Step 4: Simplify right side
    86,638.40x = 6,399,575,381.76
  5. Step 5: Solve for x
    x = 6,399,575,381.76/86,638.40
  6. Step 6: Final answer
    x = 73,865.35

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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.