Home / 128,395.95-192,436.18-72,117.76

Finding the Fourth Proportional to 128,395.95, 192,436.18 and 72,117.76

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Solution

The fourth proportional to 128,395.95, 192,436.18 and 72,117.76 is: 108,088.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,395.95 : 192,436.18 = 72,117.76 : x
  2. Step 2: Convert to fraction form
    128,395.95/192,436.18 = 72,117.76/x
  3. Step 3: Cross multiply
    128,395.95x = 192,436.18 × 72,117.76
  4. Step 4: Simplify right side
    128,395.95x = 13,878,065,718.39
  5. Step 5: Solve for x
    x = 13,878,065,718.39/128,395.95
  6. Step 6: Final answer
    x = 108,088.03

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1.5x scale

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.