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Finding the Fourth Proportional to 70,479.36, 105,688.32 and 23,719.68

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Solution

The fourth proportional to 70,479.36, 105,688.32 and 23,719.68 is: 35,569.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,479.36 : 105,688.32 = 23,719.68 : x
  2. Step 2: Convert to fraction form
    70,479.36/105,688.32 = 23,719.68/x
  3. Step 3: Cross multiply
    70,479.36x = 105,688.32 × 23,719.68
  4. Step 4: Simplify right side
    70,479.36x = 2,506,893,130.14
  5. Step 5: Solve for x
    x = 2,506,893,130.14/70,479.36
  6. Step 6: Final answer
    x = 35,569.18

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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.