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Finding the Fourth Proportional to 70,473.35, 105,693.85 and 42,018.36

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Solution

The fourth proportional to 70,473.35, 105,693.85 and 42,018.36 is: 63,017.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,473.35 : 105,693.85 = 42,018.36 : x
  2. Step 2: Convert to fraction form
    70,473.35/105,693.85 = 42,018.36/x
  3. Step 3: Cross multiply
    70,473.35x = 105,693.85 × 42,018.36
  4. Step 4: Simplify right side
    70,473.35x = 4,441,081,895.26
  5. Step 5: Solve for x
    x = 4,441,081,895.26/70,473.35
  6. Step 6: Final answer
    x = 63,017.89

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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.