Home / 128,295,340.21-177,051,303.61-72,539,562.93

Finding the Fourth Proportional to 128,295,340.21, 177,051,303.61 and 72,539,562.93

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Solution

The fourth proportional to 128,295,340.21, 177,051,303.61 and 72,539,562.93 is: 100,106,708.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,295,340.21 : 177,051,303.61 = 72,539,562.93 : x
  2. Step 2: Convert to fraction form
    128,295,340.21/177,051,303.61 = 72,539,562.93/x
  3. Step 3: Cross multiply
    128,295,340.21x = 177,051,303.61 × 72,539,562.93
  4. Step 4: Simplify right side
    128,295,340.21x = 12,843,224,179,618,510
  5. Step 5: Solve for x
    x = 12,843,224,179,618,510/128,295,340.21
  6. Step 6: Final answer
    x = 100,106,708.16

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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.