Home / 134,987.04-186,304.95-78,431.22

Finding the Fourth Proportional to 134,987.04, 186,304.95 and 78,431.22

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Solution

The fourth proportional to 134,987.04, 186,304.95 and 78,431.22 is: 108,248.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,987.04 : 186,304.95 = 78,431.22 : x
  2. Step 2: Convert to fraction form
    134,987.04/186,304.95 = 78,431.22/x
  3. Step 3: Cross multiply
    134,987.04x = 186,304.95 × 78,431.22
  4. Step 4: Simplify right side
    134,987.04x = 14,612,124,520.54
  5. Step 5: Solve for x
    x = 14,612,124,520.54/134,987.04
  6. Step 6: Final answer
    x = 108,248.35

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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.