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Finding the Fourth Proportional to 343,434.64, 515,176.56 and 90,712.61

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Solution

The fourth proportional to 343,434.64, 515,176.56 and 90,712.61 is: 136,075.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,434.64 : 515,176.56 = 90,712.61 : x
  2. Step 2: Convert to fraction form
    343,434.64/515,176.56 = 90,712.61/x
  3. Step 3: Cross multiply
    343,434.64x = 515,176.56 × 90,712.61
  4. Step 4: Simplify right side
    343,434.64x = 46,733,010,368.42
  5. Step 5: Solve for x
    x = 46,733,010,368.42/343,434.64
  6. Step 6: Final answer
    x = 136,075.41

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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.