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Finding the Fourth Proportional to 66,437.16, 99,668.58 and 21,470.62

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Solution

The fourth proportional to 66,437.16, 99,668.58 and 21,470.62 is: 32,210.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,437.16 : 99,668.58 = 21,470.62 : x
  2. Step 2: Convert to fraction form
    66,437.16/99,668.58 = 21,470.62/x
  3. Step 3: Cross multiply
    66,437.16x = 99,668.58 × 21,470.62
  4. Step 4: Simplify right side
    66,437.16x = 2,139,946,064.31
  5. Step 5: Solve for x
    x = 2,139,946,064.31/66,437.16
  6. Step 6: Final answer
    x = 32,210.08

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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.