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Finding the Fourth Proportional to 303,354.95, 455,039.47 and 78,724.24

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Solution

The fourth proportional to 303,354.95, 455,039.47 and 78,724.24 is: 118,088.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,354.95 : 455,039.47 = 78,724.24 : x
  2. Step 2: Convert to fraction form
    303,354.95/455,039.47 = 78,724.24/x
  3. Step 3: Cross multiply
    303,354.95x = 455,039.47 × 78,724.24
  4. Step 4: Simplify right side
    303,354.95x = 35,822,637,386.54
  5. Step 5: Solve for x
    x = 35,822,637,386.54/303,354.95
  6. Step 6: Final answer
    x = 118,088.19

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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.