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Finding the Fourth Proportional to 229,987.68, 317,380.58 and 128,011.52

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Solution

The fourth proportional to 229,987.68, 317,380.58 and 128,011.52 is: 176,654.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    229,987.68 : 317,380.58 = 128,011.52 : x
  2. Step 2: Convert to fraction form
    229,987.68/317,380.58 = 128,011.52/x
  3. Step 3: Cross multiply
    229,987.68x = 317,380.58 × 128,011.52
  4. Step 4: Simplify right side
    229,987.68x = 40,628,368,237.32
  5. Step 5: Solve for x
    x = 40,628,368,237.32/229,987.68
  6. Step 6: Final answer
    x = 176,654.54

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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.