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Finding the Fourth Proportional to 70,365.57, 105,547.67 and 30,412.81

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Solution

The fourth proportional to 70,365.57, 105,547.67 and 30,412.81 is: 45,618.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,365.57 : 105,547.67 = 30,412.81 : x
  2. Step 2: Convert to fraction form
    70,365.57/105,547.67 = 30,412.81/x
  3. Step 3: Cross multiply
    70,365.57x = 105,547.67 × 30,412.81
  4. Step 4: Simplify right side
    70,365.57x = 3,210,001,233.65
  5. Step 5: Solve for x
    x = 3,210,001,233.65/70,365.57
  6. Step 6: Final answer
    x = 45,618.92

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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.