Home / 138,017.79-190,451.30-77,574.51

Finding the Fourth Proportional to 138,017.79, 190,451.30 and 77,574.51

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Solution

The fourth proportional to 138,017.79, 190,451.30 and 77,574.51 is: 107,045.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,017.79 : 190,451.30 = 77,574.51 : x
  2. Step 2: Convert to fraction form
    138,017.79/190,451.30 = 77,574.51/x
  3. Step 3: Cross multiply
    138,017.79x = 190,451.30 × 77,574.51
  4. Step 4: Simplify right side
    138,017.79x = 14,774,165,518.04
  5. Step 5: Solve for x
    x = 14,774,165,518.04/138,017.79
  6. Step 6: Final answer
    x = 107,045.37

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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.