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Finding the Fourth Proportional to 155,340, 214,386.84 and 86,436.36

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Solution

The fourth proportional to 155,340, 214,386.84 and 86,436.36 is: 119,291.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,340 : 214,386.84 = 86,436.36 : x
  2. Step 2: Convert to fraction form
    155,340/214,386.84 = 86,436.36/x
  3. Step 3: Cross multiply
    155,340x = 214,386.84 × 86,436.36
  4. Step 4: Simplify right side
    155,340x = 18,530,818,081.50
  5. Step 5: Solve for x
    x = 18,530,818,081.50/155,340
  6. Step 6: Final answer
    x = 119,291.99

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1.5x scale

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.