Home / 86,616.48-129,925.80-30,458.28

Finding the Fourth Proportional to 86,616.48, 129,925.80 and 30,458.28

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Solution

The fourth proportional to 86,616.48, 129,925.80 and 30,458.28 is: 45,687.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,616.48 : 129,925.80 = 30,458.28 : x
  2. Step 2: Convert to fraction form
    86,616.48/129,925.80 = 30,458.28/x
  3. Step 3: Cross multiply
    86,616.48x = 129,925.80 × 30,458.28
  4. Step 4: Simplify right side
    86,616.48x = 3,957,316,395.62
  5. Step 5: Solve for x
    x = 3,957,316,395.62/86,616.48
  6. Step 6: Final answer
    x = 45,687.80

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1.5x scale

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.