Home / 258,869.08-388,145.04-100,913

Finding the Fourth Proportional to 258,869.08, 388,145.04 and 100,913

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Solution

The fourth proportional to 258,869.08, 388,145.04 and 100,913 is: 151,307.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,869.08 : 388,145.04 = 100,913 : x
  2. Step 2: Convert to fraction form
    258,869.08/388,145.04 = 100,913/x
  3. Step 3: Cross multiply
    258,869.08x = 388,145.04 × 100,913
  4. Step 4: Simplify right side
    258,869.08x = 39,168,880,421.52
  5. Step 5: Solve for x
    x = 39,168,880,421.52/258,869.08
  6. Step 6: Final answer
    x = 151,307.68

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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.