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Finding the Fourth Proportional to 217,779.90, 300,483.68 and 127,084.10

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Solution

The fourth proportional to 217,779.90, 300,483.68 and 127,084.10 is: 175,345.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,779.90 : 300,483.68 = 127,084.10 : x
  2. Step 2: Convert to fraction form
    217,779.90/300,483.68 = 127,084.10/x
  3. Step 3: Cross multiply
    217,779.90x = 300,483.68 × 127,084.10
  4. Step 4: Simplify right side
    217,779.90x = 38,186,698,037.49
  5. Step 5: Solve for x
    x = 38,186,698,037.49/217,779.90
  6. Step 6: Final answer
    x = 175,345.37

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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.