Home / 128,831,008.80-193,246,513.20-77,812,672.80

Finding the Fourth Proportional to 128,831,008.80, 193,246,513.20 and 77,812,672.80

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Solution

The fourth proportional to 128,831,008.80, 193,246,513.20 and 77,812,672.80 is: 116,719,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,831,008.80 : 193,246,513.20 = 77,812,672.80 : x
  2. Step 2: Convert to fraction form
    128,831,008.80/193,246,513.20 = 77,812,672.80/x
  3. Step 3: Cross multiply
    128,831,008.80x = 193,246,513.20 × 77,812,672.80
  4. Step 4: Simplify right side
    128,831,008.80x = 15,037,027,701,372,480
  5. Step 5: Solve for x
    x = 15,037,027,701,372,480/128,831,008.80
  6. Step 6: Final answer
    x = 116,719,009.20

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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.