Home / 105,459.05-145,533.69-57,715.43

Finding the Fourth Proportional to 105,459.05, 145,533.69 and 57,715.43

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Solution

The fourth proportional to 105,459.05, 145,533.69 and 57,715.43 is: 79,647.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,459.05 : 145,533.69 = 57,715.43 : x
  2. Step 2: Convert to fraction form
    105,459.05/145,533.69 = 57,715.43/x
  3. Step 3: Cross multiply
    105,459.05x = 145,533.69 × 57,715.43
  4. Step 4: Simplify right side
    105,459.05x = 8,399,538,770.17
  5. Step 5: Solve for x
    x = 8,399,538,770.17/105,459.05
  6. Step 6: Final answer
    x = 79,647.40

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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.