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Finding the Fourth Proportional to 128,301.90, 177,051.87 and 71,714.22

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Solution

The fourth proportional to 128,301.90, 177,051.87 and 71,714.22 is: 98,962.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,301.90 : 177,051.87 = 71,714.22 : x
  2. Step 2: Convert to fraction form
    128,301.90/177,051.87 = 71,714.22/x
  3. Step 3: Cross multiply
    128,301.90x = 177,051.87 × 71,714.22
  4. Step 4: Simplify right side
    128,301.90x = 12,697,136,756.59
  5. Step 5: Solve for x
    x = 12,697,136,756.59/128,301.90
  6. Step 6: Final answer
    x = 98,962.97

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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.