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Finding the Fourth Proportional to 86,695.40, 130,043.10 and 34,087.40

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Solution

The fourth proportional to 86,695.40, 130,043.10 and 34,087.40 is: 51,131.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,695.40 : 130,043.10 = 34,087.40 : x
  2. Step 2: Convert to fraction form
    86,695.40/130,043.10 = 34,087.40/x
  3. Step 3: Cross multiply
    86,695.40x = 130,043.10 × 34,087.40
  4. Step 4: Simplify right side
    86,695.40x = 4,432,831,166.94
  5. Step 5: Solve for x
    x = 4,432,831,166.94/86,695.40
  6. Step 6: Final answer
    x = 51,131.10

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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.