Home / 42,928.74-64,077.29-39,920.40

Finding the Fourth Proportional to 42,928.74, 64,077.29 and 39,920.40

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Solution

The fourth proportional to 42,928.74, 64,077.29 and 39,920.40 is: 59,586.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,928.74 : 64,077.29 = 39,920.40 : x
  2. Step 2: Convert to fraction form
    42,928.74/64,077.29 = 39,920.40/x
  3. Step 3: Cross multiply
    42,928.74x = 64,077.29 × 39,920.40
  4. Step 4: Simplify right side
    42,928.74x = 2,557,990,848.11
  5. Step 5: Solve for x
    x = 2,557,990,848.11/42,928.74
  6. Step 6: Final answer
    x = 59,586.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.