Home / 100,979.16-139,351.91-57,947.18

Finding the Fourth Proportional to 100,979.16, 139,351.91 and 57,947.18

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Solution

The fourth proportional to 100,979.16, 139,351.91 and 57,947.18 is: 79,967.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,979.16 : 139,351.91 = 57,947.18 : x
  2. Step 2: Convert to fraction form
    100,979.16/139,351.91 = 57,947.18/x
  3. Step 3: Cross multiply
    100,979.16x = 139,351.91 × 57,947.18
  4. Step 4: Simplify right side
    100,979.16x = 8,075,049,225.62
  5. Step 5: Solve for x
    x = 8,075,049,225.62/100,979.16
  6. Step 6: Final answer
    x = 79,967.48

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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.