Home / 258,869.07-388,416.69-90,510.30

Finding the Fourth Proportional to 258,869.07, 388,416.69 and 90,510.30

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Solution

The fourth proportional to 258,869.07, 388,416.69 and 90,510.30 is: 135,804.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,869.07 : 388,416.69 = 90,510.30 : x
  2. Step 2: Convert to fraction form
    258,869.07/388,416.69 = 90,510.30/x
  3. Step 3: Cross multiply
    258,869.07x = 388,416.69 × 90,510.30
  4. Step 4: Simplify right side
    258,869.07x = 35,155,711,136.91
  5. Step 5: Solve for x
    x = 35,155,711,136.91/258,869.07
  6. Step 6: Final answer
    x = 135,804.99

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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.