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Finding the Fourth Proportional to 145,278.77, 217,938.94 and 70,337.39

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Solution

The fourth proportional to 145,278.77, 217,938.94 and 70,337.39 is: 105,516.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,278.77 : 217,938.94 = 70,337.39 : x
  2. Step 2: Convert to fraction form
    145,278.77/217,938.94 = 70,337.39/x
  3. Step 3: Cross multiply
    145,278.77x = 217,938.94 × 70,337.39
  4. Step 4: Simplify right side
    145,278.77x = 15,329,254,953.43
  5. Step 5: Solve for x
    x = 15,329,254,953.43/145,278.77
  6. Step 6: Final answer
    x = 105,516.14

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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.