Home / 134,980.12-186,272.60-78,395.16

Finding the Fourth Proportional to 134,980.12, 186,272.60 and 78,395.16

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Solution

The fourth proportional to 134,980.12, 186,272.60 and 78,395.16 is: 108,185.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,980.12 : 186,272.60 = 78,395.16 : x
  2. Step 2: Convert to fraction form
    134,980.12/186,272.60 = 78,395.16/x
  3. Step 3: Cross multiply
    134,980.12x = 186,272.60 × 78,395.16
  4. Step 4: Simplify right side
    134,980.12x = 14,602,870,280.62
  5. Step 5: Solve for x
    x = 14,602,870,280.62/134,980.12
  6. Step 6: Final answer
    x = 108,185.34

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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.