Home / 128,281.01-177,038.51-85,184.34

Finding the Fourth Proportional to 128,281.01, 177,038.51 and 85,184.34

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Solution

The fourth proportional to 128,281.01, 177,038.51 and 85,184.34 is: 117,561.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,281.01 : 177,038.51 = 85,184.34 : x
  2. Step 2: Convert to fraction form
    128,281.01/177,038.51 = 85,184.34/x
  3. Step 3: Cross multiply
    128,281.01x = 177,038.51 × 85,184.34
  4. Step 4: Simplify right side
    128,281.01x = 15,080,908,203.01
  5. Step 5: Solve for x
    x = 15,080,908,203.01/128,281.01
  6. Step 6: Final answer
    x = 117,561.51

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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.