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Finding the Fourth Proportional to 145,278.39, 217,938.38 and 70,337.01

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Solution

The fourth proportional to 145,278.39, 217,938.38 and 70,337.01 is: 105,515.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,278.39 : 217,938.38 = 70,337.01 : x
  2. Step 2: Convert to fraction form
    145,278.39/217,938.38 = 70,337.01/x
  3. Step 3: Cross multiply
    145,278.39x = 217,938.38 × 70,337.01
  4. Step 4: Simplify right side
    145,278.39x = 15,329,133,661.76
  5. Step 5: Solve for x
    x = 15,329,133,661.76/145,278.39
  6. Step 6: Final answer
    x = 105,515.58

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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.