Home / 288,513.36-432,715.68-78,123.60

Finding the Fourth Proportional to 288,513.36, 432,715.68 and 78,123.60

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Solution

The fourth proportional to 288,513.36, 432,715.68 and 78,123.60 is: 117,170.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,513.36 : 432,715.68 = 78,123.60 : x
  2. Step 2: Convert to fraction form
    288,513.36/432,715.68 = 78,123.60/x
  3. Step 3: Cross multiply
    288,513.36x = 432,715.68 × 78,123.60
  4. Step 4: Simplify right side
    288,513.36x = 33,805,306,698.05
  5. Step 5: Solve for x
    x = 33,805,306,698.05/288,513.36
  6. Step 6: Final answer
    x = 117,170.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.