Home / 105,428.05-145,491.06-57,681.25

Finding the Fourth Proportional to 105,428.05, 145,491.06 and 57,681.25

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Solution

The fourth proportional to 105,428.05, 145,491.06 and 57,681.25 is: 79,600.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,428.05 : 145,491.06 = 57,681.25 : x
  2. Step 2: Convert to fraction form
    105,428.05/145,491.06 = 57,681.25/x
  3. Step 3: Cross multiply
    105,428.05x = 145,491.06 × 57,681.25
  4. Step 4: Simplify right side
    105,428.05x = 8,392,106,204.63
  5. Step 5: Solve for x
    x = 8,392,106,204.63/105,428.05
  6. Step 6: Final answer
    x = 79,600.32

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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.