Home / 128,946.74-177,943.66-71,582.76

Finding the Fourth Proportional to 128,946.74, 177,943.66 and 71,582.76

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Solution

The fourth proportional to 128,946.74, 177,943.66 and 71,582.76 is: 98,782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,946.74 : 177,943.66 = 71,582.76 : x
  2. Step 2: Convert to fraction form
    128,946.74/177,943.66 = 71,582.76/x
  3. Step 3: Cross multiply
    128,946.74x = 177,943.66 × 71,582.76
  4. Step 4: Simplify right side
    128,946.74x = 12,737,698,307.30
  5. Step 5: Solve for x
    x = 12,737,698,307.30/128,946.74
  6. Step 6: Final answer
    x = 98,782.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.