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Finding the Fourth Proportional to 145,547.56, 217,916.40 and 74,316.34

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Solution

The fourth proportional to 145,547.56, 217,916.40 and 74,316.34 is: 111,267.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,547.56 : 217,916.40 = 74,316.34 : x
  2. Step 2: Convert to fraction form
    145,547.56/217,916.40 = 74,316.34/x
  3. Step 3: Cross multiply
    145,547.56x = 217,916.40 × 74,316.34
  4. Step 4: Simplify right side
    145,547.56x = 16,194,749,273.98
  5. Step 5: Solve for x
    x = 16,194,749,273.98/145,547.56
  6. Step 6: Final answer
    x = 111,267.75

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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.