Home / 385,623.06-578,428.38-105,140.31

Finding the Fourth Proportional to 385,623.06, 578,428.38 and 105,140.31

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Solution

The fourth proportional to 385,623.06, 578,428.38 and 105,140.31 is: 157,708.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,623.06 : 578,428.38 = 105,140.31 : x
  2. Step 2: Convert to fraction form
    385,623.06/578,428.38 = 105,140.31/x
  3. Step 3: Cross multiply
    385,623.06x = 578,428.38 × 105,140.31
  4. Step 4: Simplify right side
    385,623.06x = 60,816,139,186.00
  5. Step 5: Solve for x
    x = 60,816,139,186.00/385,623.06
  6. Step 6: Final answer
    x = 157,708.77

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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.