Home / 134,890.56-186,128.88-78,291.12

Finding the Fourth Proportional to 134,890.56, 186,128.88 and 78,291.12

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Solution

The fourth proportional to 134,890.56, 186,128.88 and 78,291.12 is: 108,030.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,890.56 : 186,128.88 = 78,291.12 : x
  2. Step 2: Convert to fraction form
    134,890.56/186,128.88 = 78,291.12/x
  3. Step 3: Cross multiply
    134,890.56x = 186,128.88 × 78,291.12
  4. Step 4: Simplify right side
    134,890.56x = 14,572,238,479.55
  5. Step 5: Solve for x
    x = 14,572,238,479.55/134,890.56
  6. Step 6: Final answer
    x = 108,030.08

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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.