Home / 100,417.42-138,571.05-57,395.62

Finding the Fourth Proportional to 100,417.42, 138,571.05 and 57,395.62

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Solution

The fourth proportional to 100,417.42, 138,571.05 and 57,395.62 is: 79,203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,417.42 : 138,571.05 = 57,395.62 : x
  2. Step 2: Convert to fraction form
    100,417.42/138,571.05 = 57,395.62/x
  3. Step 3: Cross multiply
    100,417.42x = 138,571.05 × 57,395.62
  4. Step 4: Simplify right side
    100,417.42x = 7,953,371,328.80
  5. Step 5: Solve for x
    x = 7,953,371,328.80/100,417.42
  6. Step 6: Final answer
    x = 79,203.10

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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.