Home / 78,557.12-117,873.24-39,117.68

Finding the Fourth Proportional to 78,557.12, 117,873.24 and 39,117.68

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Solution

The fourth proportional to 78,557.12, 117,873.24 and 39,117.68 is: 58,695.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,557.12 : 117,873.24 = 39,117.68 : x
  2. Step 2: Convert to fraction form
    78,557.12/117,873.24 = 39,117.68/x
  3. Step 3: Cross multiply
    78,557.12x = 117,873.24 × 39,117.68
  4. Step 4: Simplify right side
    78,557.12x = 4,610,927,682.88
  5. Step 5: Solve for x
    x = 4,610,927,682.88/78,557.12
  6. Step 6: Final answer
    x = 58,695.22

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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.