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Finding the Fourth Proportional to 128,858.24, 177,820.94 and 70,714.80

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Solution

The fourth proportional to 128,858.24, 177,820.94 and 70,714.80 is: 97,584.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,858.24 : 177,820.94 = 70,714.80 : x
  2. Step 2: Convert to fraction form
    128,858.24/177,820.94 = 70,714.80/x
  3. Step 3: Cross multiply
    128,858.24x = 177,820.94 × 70,714.80
  4. Step 4: Simplify right side
    128,858.24x = 12,574,572,207.91
  5. Step 5: Solve for x
    x = 12,574,572,207.91/128,858.24
  6. Step 6: Final answer
    x = 97,584.54

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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.