Home / 138,628.91-191,308.35-74,967.16

Finding the Fourth Proportional to 138,628.91, 191,308.35 and 74,967.16

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Solution

The fourth proportional to 138,628.91, 191,308.35 and 74,967.16 is: 103,454.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,628.91 : 191,308.35 = 74,967.16 : x
  2. Step 2: Convert to fraction form
    138,628.91/191,308.35 = 74,967.16/x
  3. Step 3: Cross multiply
    138,628.91x = 191,308.35 × 74,967.16
  4. Step 4: Simplify right side
    138,628.91x = 14,341,843,683.79
  5. Step 5: Solve for x
    x = 14,341,843,683.79/138,628.91
  6. Step 6: Final answer
    x = 103,454.93

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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.