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Finding the Fourth Proportional to 86,730.70, 130,108.20 and 36,810.40

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Solution

The fourth proportional to 86,730.70, 130,108.20 and 36,810.40 is: 55,220.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,730.70 : 130,108.20 = 36,810.40 : x
  2. Step 2: Convert to fraction form
    86,730.70/130,108.20 = 36,810.40/x
  3. Step 3: Cross multiply
    86,730.70x = 130,108.20 × 36,810.40
  4. Step 4: Simplify right side
    86,730.70x = 4,789,334,885.28
  5. Step 5: Solve for x
    x = 4,789,334,885.28/86,730.70
  6. Step 6: Final answer
    x = 55,220.76

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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.