Home / 342,228.74-512,981.10-128,904.34

Finding the Fourth Proportional to 342,228.74, 512,981.10 and 128,904.34

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Solution

The fourth proportional to 342,228.74, 512,981.10 and 128,904.34 is: 193,220.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,228.74 : 512,981.10 = 128,904.34 : x
  2. Step 2: Convert to fraction form
    342,228.74/512,981.10 = 128,904.34/x
  3. Step 3: Cross multiply
    342,228.74x = 512,981.10 × 128,904.34
  4. Step 4: Simplify right side
    342,228.74x = 66,125,490,127.97
  5. Step 5: Solve for x
    x = 66,125,490,127.97/342,228.74
  6. Step 6: Final answer
    x = 193,220.15

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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.