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Finding the Fourth Proportional to 128,859.63, 177,904.04 and 84,225.39

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Solution

The fourth proportional to 128,859.63, 177,904.04 and 84,225.39 is: 116,281.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,859.63 : 177,904.04 = 84,225.39 : x
  2. Step 2: Convert to fraction form
    128,859.63/177,904.04 = 84,225.39/x
  3. Step 3: Cross multiply
    128,859.63x = 177,904.04 × 84,225.39
  4. Step 4: Simplify right side
    128,859.63x = 14,984,037,151.58
  5. Step 5: Solve for x
    x = 14,984,037,151.58/128,859.63
  6. Step 6: Final answer
    x = 116,281.86

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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.