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Finding the Fourth Proportional to 145,317.40, 217,830.30 and 66,488.20

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Solution

The fourth proportional to 145,317.40, 217,830.30 and 66,488.20 is: 99,665.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,317.40 : 217,830.30 = 66,488.20 : x
  2. Step 2: Convert to fraction form
    145,317.40/217,830.30 = 66,488.20/x
  3. Step 3: Cross multiply
    145,317.40x = 217,830.30 × 66,488.20
  4. Step 4: Simplify right side
    145,317.40x = 14,483,144,552.46
  5. Step 5: Solve for x
    x = 14,483,144,552.46/145,317.40
  6. Step 6: Final answer
    x = 99,665.59

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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.