Home / 128,435,335.89-177,240,879.45-69,698,001.63

Finding the Fourth Proportional to 128,435,335.89, 177,240,879.45 and 69,698,001.63

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Solution

The fourth proportional to 128,435,335.89, 177,240,879.45 and 69,698,001.63 is: 96,183,305.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,435,335.89 : 177,240,879.45 = 69,698,001.63 : x
  2. Step 2: Convert to fraction form
    128,435,335.89/177,240,879.45 = 69,698,001.63/x
  3. Step 3: Cross multiply
    128,435,335.89x = 177,240,879.45 × 69,698,001.63
  4. Step 4: Simplify right side
    128,435,335.89x = 12,353,335,104,808,732
  5. Step 5: Solve for x
    x = 12,353,335,104,808,732/128,435,335.89
  6. Step 6: Final answer
    x = 96,183,305.16

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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.