Home / 103,176.28-142,338.16-72,987.48

Finding the Fourth Proportional to 103,176.28, 142,338.16 and 72,987.48

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Solution

The fourth proportional to 103,176.28, 142,338.16 and 72,987.48 is: 100,690.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,176.28 : 142,338.16 = 72,987.48 : x
  2. Step 2: Convert to fraction form
    103,176.28/142,338.16 = 72,987.48/x
  3. Step 3: Cross multiply
    103,176.28x = 142,338.16 × 72,987.48
  4. Step 4: Simplify right side
    103,176.28x = 10,388,903,697.47
  5. Step 5: Solve for x
    x = 10,388,903,697.47/103,176.28
  6. Step 6: Final answer
    x = 100,690.81

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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.