Home / 128,288,813.10-177,064,281.64-76,106,813.10

Finding the Fourth Proportional to 128,288,813.10, 177,064,281.64 and 76,106,813.10

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Solution

The fourth proportional to 128,288,813.10, 177,064,281.64 and 76,106,813.10 is: 105,042,660.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288,813.10 : 177,064,281.64 = 76,106,813.10 : x
  2. Step 2: Convert to fraction form
    128,288,813.10/177,064,281.64 = 76,106,813.10/x
  3. Step 3: Cross multiply
    128,288,813.10x = 177,064,281.64 × 76,106,813.10
  4. Step 4: Simplify right side
    128,288,813.10x = 13,475,798,189,461,240
  5. Step 5: Solve for x
    x = 13,475,798,189,461,240/128,288,813.10
  6. Step 6: Final answer
    x = 105,042,660.10

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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.