Home / 121,128,003.80-181,692,005.70-70,109,667.80

Finding the Fourth Proportional to 121,128,003.80, 181,692,005.70 and 70,109,667.80

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Solution

The fourth proportional to 121,128,003.80, 181,692,005.70 and 70,109,667.80 is: 105,164,501.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,128,003.80 : 181,692,005.70 = 70,109,667.80 : x
  2. Step 2: Convert to fraction form
    121,128,003.80/181,692,005.70 = 70,109,667.80/x
  3. Step 3: Cross multiply
    121,128,003.80x = 181,692,005.70 × 70,109,667.80
  4. Step 4: Simplify right side
    121,128,003.80x = 12,738,366,161,542,706
  5. Step 5: Solve for x
    x = 12,738,366,161,542,706/121,128,003.80
  6. Step 6: Final answer
    x = 105,164,501.70

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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.