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Finding the Fourth Proportional to 64,881.80, 97,322.70 and 42,720.20

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Solution

The fourth proportional to 64,881.80, 97,322.70 and 42,720.20 is: 64,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,881.80 : 97,322.70 = 42,720.20 : x
  2. Step 2: Convert to fraction form
    64,881.80/97,322.70 = 42,720.20/x
  3. Step 3: Cross multiply
    64,881.80x = 97,322.70 × 42,720.20
  4. Step 4: Simplify right side
    64,881.80x = 4,157,645,208.54
  5. Step 5: Solve for x
    x = 4,157,645,208.54/64,881.80
  6. Step 6: Final answer
    x = 64,080.30

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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.