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Finding the Fourth Proportional to 292,547.70, 438,823.21 and 90,141.15

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Solution

The fourth proportional to 292,547.70, 438,823.21 and 90,141.15 is: 135,212.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,547.70 : 438,823.21 = 90,141.15 : x
  2. Step 2: Convert to fraction form
    292,547.70/438,823.21 = 90,141.15/x
  3. Step 3: Cross multiply
    292,547.70x = 438,823.21 × 90,141.15
  4. Step 4: Simplify right side
    292,547.70x = 39,556,028,796.09
  5. Step 5: Solve for x
    x = 39,556,028,796.09/292,547.70
  6. Step 6: Final answer
    x = 135,212.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.