Home / 80,931,639.30-121,397,458.95-72,428,583.30

Finding the Fourth Proportional to 80,931,639.30, 121,397,458.95 and 72,428,583.30

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Solution

The fourth proportional to 80,931,639.30, 121,397,458.95 and 72,428,583.30 is: 108,642,874.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,931,639.30 : 121,397,458.95 = 72,428,583.30 : x
  2. Step 2: Convert to fraction form
    80,931,639.30/121,397,458.95 = 72,428,583.30/x
  3. Step 3: Cross multiply
    80,931,639.30x = 121,397,458.95 × 72,428,583.30
  4. Step 4: Simplify right side
    80,931,639.30x = 8,792,645,967,968,405
  5. Step 5: Solve for x
    x = 8,792,645,967,968,405/80,931,639.30
  6. Step 6: Final answer
    x = 108,642,874.95

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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.