Home / 77,940.07-107,557.25-42,130.08

Finding the Fourth Proportional to 77,940.07, 107,557.25 and 42,130.08

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Solution

The fourth proportional to 77,940.07, 107,557.25 and 42,130.08 is: 58,139.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,940.07 : 107,557.25 = 42,130.08 : x
  2. Step 2: Convert to fraction form
    77,940.07/107,557.25 = 42,130.08/x
  3. Step 3: Cross multiply
    77,940.07x = 107,557.25 × 42,130.08
  4. Step 4: Simplify right side
    77,940.07x = 4,531,395,415.42
  5. Step 5: Solve for x
    x = 4,531,395,415.42/77,940.07
  6. Step 6: Final answer
    x = 58,139.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.