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Finding the Fourth Proportional to 90,316, 124,636.08 and 50,572

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Solution

The fourth proportional to 90,316, 124,636.08 and 50,572 is: 69,789.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,316 : 124,636.08 = 50,572 : x
  2. Step 2: Convert to fraction form
    90,316/124,636.08 = 50,572/x
  3. Step 3: Cross multiply
    90,316x = 124,636.08 × 50,572
  4. Step 4: Simplify right side
    90,316x = 6,303,095,837.76
  5. Step 5: Solve for x
    x = 6,303,095,837.76/90,316
  6. Step 6: Final answer
    x = 69,789.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.