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Finding the Fourth Proportional to 86,597.64, 129,807.36 and 47,144.16

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Solution

The fourth proportional to 86,597.64, 129,807.36 and 47,144.16 is: 70,667.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,597.64 : 129,807.36 = 47,144.16 : x
  2. Step 2: Convert to fraction form
    86,597.64/129,807.36 = 47,144.16/x
  3. Step 3: Cross multiply
    86,597.64x = 129,807.36 × 47,144.16
  4. Step 4: Simplify right side
    86,597.64x = 6,119,658,949.02
  5. Step 5: Solve for x
    x = 6,119,658,949.02/86,597.64
  6. Step 6: Final answer
    x = 70,667.73

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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.