Home / 456,407,796.80-684,640,334-128,908,953.20

Finding the Fourth Proportional to 456,407,796.80, 684,640,334 and 128,908,953.20

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Solution

The fourth proportional to 456,407,796.80, 684,640,334 and 128,908,953.20 is: 193,371,518.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,407,796.80 : 684,640,334 = 128,908,953.20 : x
  2. Step 2: Convert to fraction form
    456,407,796.80/684,640,334 = 128,908,953.20/x
  3. Step 3: Cross multiply
    456,407,796.80x = 684,640,334 × 128,908,953.20
  4. Step 4: Simplify right side
    456,407,796.80x = 88,256,268,774,438,368
  5. Step 5: Solve for x
    x = 88,256,268,774,438,368/456,407,796.80
  6. Step 6: Final answer
    x = 193,371,518.61

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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.