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Finding the Fourth Proportional to 155,707.79, 214,876.73 and 84,087.80

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Solution

The fourth proportional to 155,707.79, 214,876.73 and 84,087.80 is: 116,041.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,707.79 : 214,876.73 = 84,087.80 : x
  2. Step 2: Convert to fraction form
    155,707.79/214,876.73 = 84,087.80/x
  3. Step 3: Cross multiply
    155,707.79x = 214,876.73 × 84,087.80
  4. Step 4: Simplify right side
    155,707.79x = 18,068,510,002.07
  5. Step 5: Solve for x
    x = 18,068,510,002.07/155,707.79
  6. Step 6: Final answer
    x = 116,041.15

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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.