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Finding the Fourth Proportional to 70,458.05, 105,780.90 and 40,897.10

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Solution

The fourth proportional to 70,458.05, 105,780.90 and 40,897.10 is: 61,400.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,458.05 : 105,780.90 = 40,897.10 : x
  2. Step 2: Convert to fraction form
    70,458.05/105,780.90 = 40,897.10/x
  3. Step 3: Cross multiply
    70,458.05x = 105,780.90 × 40,897.10
  4. Step 4: Simplify right side
    70,458.05x = 4,326,132,045.39
  5. Step 5: Solve for x
    x = 4,326,132,045.39/70,458.05
  6. Step 6: Final answer
    x = 61,400.11

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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.