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Finding the Fourth Proportional to 292,032.40, 438,048.60 and 81,686.80

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Solution

The fourth proportional to 292,032.40, 438,048.60 and 81,686.80 is: 122,530.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,032.40 : 438,048.60 = 81,686.80 : x
  2. Step 2: Convert to fraction form
    292,032.40/438,048.60 = 81,686.80/x
  3. Step 3: Cross multiply
    292,032.40x = 438,048.60 × 81,686.80
  4. Step 4: Simplify right side
    292,032.40x = 35,782,788,378.48
  5. Step 5: Solve for x
    x = 35,782,788,378.48/292,032.40
  6. Step 6: Final answer
    x = 122,530.20

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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.