Home / 103,639.07-155,461.23-77,509.67

Finding the Fourth Proportional to 103,639.07, 155,461.23 and 77,509.67

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Solution

The fourth proportional to 103,639.07, 155,461.23 and 77,509.67 is: 116,266.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,639.07 : 155,461.23 = 77,509.67 : x
  2. Step 2: Convert to fraction form
    103,639.07/155,461.23 = 77,509.67/x
  3. Step 3: Cross multiply
    103,639.07x = 155,461.23 × 77,509.67
  4. Step 4: Simplify right side
    103,639.07x = 12,049,748,635.09
  5. Step 5: Solve for x
    x = 12,049,748,635.09/103,639.07
  6. Step 6: Final answer
    x = 116,266.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.