Home / 128,871,434.16-177,843,039.72-70,134,803.37

Finding the Fourth Proportional to 128,871,434.16, 177,843,039.72 and 70,134,803.37

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Solution

The fourth proportional to 128,871,434.16, 177,843,039.72 and 70,134,803.37 is: 96,786,279.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,871,434.16 : 177,843,039.72 = 70,134,803.37 : x
  2. Step 2: Convert to fraction form
    128,871,434.16/177,843,039.72 = 70,134,803.37/x
  3. Step 3: Cross multiply
    128,871,434.16x = 177,843,039.72 × 70,134,803.37
  4. Step 4: Simplify right side
    128,871,434.16x = 12,472,986,620,245,410
  5. Step 5: Solve for x
    x = 12,472,986,620,245,410/128,871,434.16
  6. Step 6: Final answer
    x = 96,786,279.30

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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.