Home / 138,056.45-190,512.95-77,630.58

Finding the Fourth Proportional to 138,056.45, 190,512.95 and 77,630.58

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Solution

The fourth proportional to 138,056.45, 190,512.95 and 77,630.58 is: 107,127.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,056.45 : 190,512.95 = 77,630.58 : x
  2. Step 2: Convert to fraction form
    138,056.45/190,512.95 = 77,630.58/x
  3. Step 3: Cross multiply
    138,056.45x = 190,512.95 × 77,630.58
  4. Step 4: Simplify right side
    138,056.45x = 14,789,630,417.86
  5. Step 5: Solve for x
    x = 14,789,630,417.86/138,056.45
  6. Step 6: Final answer
    x = 107,127.42

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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.