Home / 292,312.40-438,436.20-81,971.60

Finding the Fourth Proportional to 292,312.40, 438,436.20 and 81,971.60

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Solution

The fourth proportional to 292,312.40, 438,436.20 and 81,971.60 is: 122,948.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,312.40 : 438,436.20 = 81,971.60 : x
  2. Step 2: Convert to fraction form
    292,312.40/438,436.20 = 81,971.60/x
  3. Step 3: Cross multiply
    292,312.40x = 438,436.20 × 81,971.60
  4. Step 4: Simplify right side
    292,312.40x = 35,939,316,811.92
  5. Step 5: Solve for x
    x = 35,939,316,811.92/292,312.40
  6. Step 6: Final answer
    x = 122,948.31

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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.