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Finding the Fourth Proportional to 128,303.52, 177,064.56 and 71,714.88

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Solution

The fourth proportional to 128,303.52, 177,064.56 and 71,714.88 is: 98,969.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,303.52 : 177,064.56 = 71,714.88 : x
  2. Step 2: Convert to fraction form
    128,303.52/177,064.56 = 71,714.88/x
  3. Step 3: Cross multiply
    128,303.52x = 177,064.56 × 71,714.88
  4. Step 4: Simplify right side
    128,303.52x = 12,698,163,672.65
  5. Step 5: Solve for x
    x = 12,698,163,672.65/128,303.52
  6. Step 6: Final answer
    x = 98,969.72

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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.