Home / 105,087.36-145,015.20-57,338.40

Finding the Fourth Proportional to 105,087.36, 145,015.20 and 57,338.40

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Solution

The fourth proportional to 105,087.36, 145,015.20 and 57,338.40 is: 79,124.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,087.36 : 145,015.20 = 57,338.40 : x
  2. Step 2: Convert to fraction form
    105,087.36/145,015.20 = 57,338.40/x
  3. Step 3: Cross multiply
    105,087.36x = 145,015.20 × 57,338.40
  4. Step 4: Simplify right side
    105,087.36x = 8,314,939,543.68
  5. Step 5: Solve for x
    x = 8,314,939,543.68/105,087.36
  6. Step 6: Final answer
    x = 79,124.07

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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.