Home / 128,316.84-176,989.38-83,665.32

Finding the Fourth Proportional to 128,316.84, 176,989.38 and 83,665.32

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Solution

The fourth proportional to 128,316.84, 176,989.38 and 83,665.32 is: 115,400.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,316.84 : 176,989.38 = 83,665.32 : x
  2. Step 2: Convert to fraction form
    128,316.84/176,989.38 = 83,665.32/x
  3. Step 3: Cross multiply
    128,316.84x = 176,989.38 × 83,665.32
  4. Step 4: Simplify right side
    128,316.84x = 14,807,873,114.30
  5. Step 5: Solve for x
    x = 14,807,873,114.30/128,316.84
  6. Step 6: Final answer
    x = 115,400.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.