Home / 78,339.36-117,509.04-28,426.08

Finding the Fourth Proportional to 78,339.36, 117,509.04 and 28,426.08

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Solution

The fourth proportional to 78,339.36, 117,509.04 and 28,426.08 is: 42,639.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339.36 : 117,509.04 = 28,426.08 : x
  2. Step 2: Convert to fraction form
    78,339.36/117,509.04 = 28,426.08/x
  3. Step 3: Cross multiply
    78,339.36x = 117,509.04 × 28,426.08
  4. Step 4: Simplify right side
    78,339.36x = 3,340,321,371.76
  5. Step 5: Solve for x
    x = 3,340,321,371.76/78,339.36
  6. Step 6: Final answer
    x = 42,639.12

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1.5x scale

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.