Home / 78,426.09-117,643.68-28,506

Finding the Fourth Proportional to 78,426.09, 117,643.68 and 28,506

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Solution

The fourth proportional to 78,426.09, 117,643.68 and 28,506 is: 42,760.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,426.09 : 117,643.68 = 28,506 : x
  2. Step 2: Convert to fraction form
    78,426.09/117,643.68 = 28,506/x
  3. Step 3: Cross multiply
    78,426.09x = 117,643.68 × 28,506
  4. Step 4: Simplify right side
    78,426.09x = 3,353,550,742.08
  5. Step 5: Solve for x
    x = 3,353,550,742.08/78,426.09
  6. Step 6: Final answer
    x = 42,760.65

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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.