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Finding the Fourth Proportional to 201,440.70, 278,011.80 and 115,427.53

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Solution

The fourth proportional to 201,440.70, 278,011.80 and 115,427.53 is: 159,303.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,440.70 : 278,011.80 = 115,427.53 : x
  2. Step 2: Convert to fraction form
    201,440.70/278,011.80 = 115,427.53/x
  3. Step 3: Cross multiply
    201,440.70x = 278,011.80 × 115,427.53
  4. Step 4: Simplify right side
    201,440.70x = 32,090,216,307.35
  5. Step 5: Solve for x
    x = 32,090,216,307.35/201,440.70
  6. Step 6: Final answer
    x = 159,303.54

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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.