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Finding the Fourth Proportional to 64,798.13, 89,451.39 and 45,693.47

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Solution

The fourth proportional to 64,798.13, 89,451.39 and 45,693.47 is: 63,078.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,798.13 : 89,451.39 = 45,693.47 : x
  2. Step 2: Convert to fraction form
    64,798.13/89,451.39 = 45,693.47/x
  3. Step 3: Cross multiply
    64,798.13x = 89,451.39 × 45,693.47
  4. Step 4: Simplify right side
    64,798.13x = 4,087,343,958.17
  5. Step 5: Solve for x
    x = 4,087,343,958.17/64,798.13
  6. Step 6: Final answer
    x = 63,078.12

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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.