Home / 343,416.08-515,113.20-90,688.80

Finding the Fourth Proportional to 343,416.08, 515,113.20 and 90,688.80

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Solution

The fourth proportional to 343,416.08, 515,113.20 and 90,688.80 is: 136,030.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,416.08 : 515,113.20 = 90,688.80 : x
  2. Step 2: Convert to fraction form
    343,416.08/515,113.20 = 90,688.80/x
  3. Step 3: Cross multiply
    343,416.08x = 515,113.20 × 90,688.80
  4. Step 4: Simplify right side
    343,416.08x = 46,714,997,972.16
  5. Step 5: Solve for x
    x = 46,714,997,972.16/343,416.08
  6. Step 6: Final answer
    x = 136,030.32

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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.