Home / 128,261,639.91-177,148,161.90-84,404,430.36

Finding the Fourth Proportional to 128,261,639.91, 177,148,161.90 and 84,404,430.36

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Solution

The fourth proportional to 128,261,639.91, 177,148,161.90 and 84,404,430.36 is: 116,574,914.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,261,639.91 : 177,148,161.90 = 84,404,430.36 : x
  2. Step 2: Convert to fraction form
    128,261,639.91/177,148,161.90 = 84,404,430.36/x
  3. Step 3: Cross multiply
    128,261,639.91x = 177,148,161.90 × 84,404,430.36
  4. Step 4: Simplify right side
    128,261,639.91x = 14,952,089,694,490,556
  5. Step 5: Solve for x
    x = 14,952,089,694,490,556/128,261,639.91
  6. Step 6: Final answer
    x = 116,574,914.41

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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.