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Finding the Fourth Proportional to 86,746.60, 130,119.90 and 21,082.60

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Solution

The fourth proportional to 86,746.60, 130,119.90 and 21,082.60 is: 31,623.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,746.60 : 130,119.90 = 21,082.60 : x
  2. Step 2: Convert to fraction form
    86,746.60/130,119.90 = 21,082.60/x
  3. Step 3: Cross multiply
    86,746.60x = 130,119.90 × 21,082.60
  4. Step 4: Simplify right side
    86,746.60x = 2,743,265,803.74
  5. Step 5: Solve for x
    x = 2,743,265,803.74/86,746.60
  6. Step 6: Final answer
    x = 31,623.90

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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.