Home / 135,192.32-186,572.40-77,840.16

Finding the Fourth Proportional to 135,192.32, 186,572.40 and 77,840.16

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Solution

The fourth proportional to 135,192.32, 186,572.40 and 77,840.16 is: 107,423.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,192.32 : 186,572.40 = 77,840.16 : x
  2. Step 2: Convert to fraction form
    135,192.32/186,572.40 = 77,840.16/x
  3. Step 3: Cross multiply
    135,192.32x = 186,572.40 × 77,840.16
  4. Step 4: Simplify right side
    135,192.32x = 14,522,825,467.58
  5. Step 5: Solve for x
    x = 14,522,825,467.58/135,192.32
  6. Step 6: Final answer
    x = 107,423.45

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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.