Home / 100,520.09-151,502.67-86,647.55

Finding the Fourth Proportional to 100,520.09, 151,502.67 and 86,647.55

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Solution

The fourth proportional to 100,520.09, 151,502.67 and 86,647.55 is: 130,594.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,520.09 : 151,502.67 = 86,647.55 : x
  2. Step 2: Convert to fraction form
    100,520.09/151,502.67 = 86,647.55/x
  3. Step 3: Cross multiply
    100,520.09x = 151,502.67 × 86,647.55
  4. Step 4: Simplify right side
    100,520.09x = 13,127,334,416.45
  5. Step 5: Solve for x
    x = 13,127,334,416.45/100,520.09
  6. Step 6: Final answer
    x = 130,594.14

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.