Home / 105,168.36-145,130.70-57,420.69

Finding the Fourth Proportional to 105,168.36, 145,130.70 and 57,420.69

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Solution

The fourth proportional to 105,168.36, 145,130.70 and 57,420.69 is: 79,239.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,168.36 : 145,130.70 = 57,420.69 : x
  2. Step 2: Convert to fraction form
    105,168.36/145,130.70 = 57,420.69/x
  3. Step 3: Cross multiply
    105,168.36x = 145,130.70 × 57,420.69
  4. Step 4: Simplify right side
    105,168.36x = 8,333,504,934.18
  5. Step 5: Solve for x
    x = 8,333,504,934.18/105,168.36
  6. Step 6: Final answer
    x = 79,239.66

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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.