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Finding the Fourth Proportional to 66,528, 91,807.38 and 36,313.20

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Solution

The fourth proportional to 66,528, 91,807.38 and 36,313.20 is: 50,111.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,528 : 91,807.38 = 36,313.20 : x
  2. Step 2: Convert to fraction form
    66,528/91,807.38 = 36,313.20/x
  3. Step 3: Cross multiply
    66,528x = 91,807.38 × 36,313.20
  4. Step 4: Simplify right side
    66,528x = 3,333,819,751.42
  5. Step 5: Solve for x
    x = 3,333,819,751.42/66,528
  6. Step 6: Final answer
    x = 50,111.53

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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.