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Finding the Fourth Proportional to 86,714.80, 130,072.20 and 45,156.40

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Solution

The fourth proportional to 86,714.80, 130,072.20 and 45,156.40 is: 67,734.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,714.80 : 130,072.20 = 45,156.40 : x
  2. Step 2: Convert to fraction form
    86,714.80/130,072.20 = 45,156.40/x
  3. Step 3: Cross multiply
    86,714.80x = 130,072.20 × 45,156.40
  4. Step 4: Simplify right side
    86,714.80x = 5,873,592,292.08
  5. Step 5: Solve for x
    x = 5,873,592,292.08/86,714.80
  6. Step 6: Final answer
    x = 67,734.60

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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.