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Finding the Fourth Proportional to 218,682.96, 301,857.96 and 128,068.06

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Solution

The fourth proportional to 218,682.96, 301,857.96 and 128,068.06 is: 176,778.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,682.96 : 301,857.96 = 128,068.06 : x
  2. Step 2: Convert to fraction form
    218,682.96/301,857.96 = 128,068.06/x
  3. Step 3: Cross multiply
    218,682.96x = 301,857.96 × 128,068.06
  4. Step 4: Simplify right side
    218,682.96x = 38,658,363,332.76
  5. Step 5: Solve for x
    x = 38,658,363,332.76/218,682.96
  6. Step 6: Final answer
    x = 176,778.12

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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.