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Finding the Fourth Proportional to 64,616.32, 89,054.40 and 47,820.16

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Solution

The fourth proportional to 64,616.32, 89,054.40 and 47,820.16 is: 65,905.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,616.32 : 89,054.40 = 47,820.16 : x
  2. Step 2: Convert to fraction form
    64,616.32/89,054.40 = 47,820.16/x
  3. Step 3: Cross multiply
    64,616.32x = 89,054.40 × 47,820.16
  4. Step 4: Simplify right side
    64,616.32x = 4,258,595,656.70
  5. Step 5: Solve for x
    x = 4,258,595,656.70/64,616.32
  6. Step 6: Final answer
    x = 65,905.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.