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Finding the Fourth Proportional to 145,259.61, 217,895.58 and 45,421.68

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Solution

The fourth proportional to 145,259.61, 217,895.58 and 45,421.68 is: 68,134.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,259.61 : 217,895.58 = 45,421.68 : x
  2. Step 2: Convert to fraction form
    145,259.61/217,895.58 = 45,421.68/x
  3. Step 3: Cross multiply
    145,259.61x = 217,895.58 × 45,421.68
  4. Step 4: Simplify right side
    145,259.61x = 9,897,183,308.17
  5. Step 5: Solve for x
    x = 9,897,183,308.17/145,259.61
  6. Step 6: Final answer
    x = 68,134.45

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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.