Home / 128,280,483.25-177,028,462.13-75,359,421.42

Finding the Fourth Proportional to 128,280,483.25, 177,028,462.13 and 75,359,421.42

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Solution

The fourth proportional to 128,280,483.25, 177,028,462.13 and 75,359,421.42 is: 103,996,821.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,280,483.25 : 177,028,462.13 = 75,359,421.42 : x
  2. Step 2: Convert to fraction form
    128,280,483.25/177,028,462.13 = 75,359,421.42/x
  3. Step 3: Cross multiply
    128,280,483.25x = 177,028,462.13 × 75,359,421.42
  4. Step 4: Simplify right side
    128,280,483.25x = 13,340,762,481,417,916
  5. Step 5: Solve for x
    x = 13,340,762,481,417,916/128,280,483.25
  6. Step 6: Final answer
    x = 103,996,821.21

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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.