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Finding the Fourth Proportional to 43,239, 64,774.58 and 28,402.90

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Solution

The fourth proportional to 43,239, 64,774.58 and 28,402.90 is: 42,549.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,239 : 64,774.58 = 28,402.90 : x
  2. Step 2: Convert to fraction form
    43,239/64,774.58 = 28,402.90/x
  3. Step 3: Cross multiply
    43,239x = 64,774.58 × 28,402.90
  4. Step 4: Simplify right side
    43,239x = 1,839,785,918.28
  5. Step 5: Solve for x
    x = 1,839,785,918.28/43,239
  6. Step 6: Final answer
    x = 42,549.22

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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.