Home / 78,038.06-107,692.80-42,228.07

Finding the Fourth Proportional to 78,038.06, 107,692.80 and 42,228.07

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Solution

The fourth proportional to 78,038.06, 107,692.80 and 42,228.07 is: 58,274.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,038.06 : 107,692.80 = 42,228.07 : x
  2. Step 2: Convert to fraction form
    78,038.06/107,692.80 = 42,228.07/x
  3. Step 3: Cross multiply
    78,038.06x = 107,692.80 × 42,228.07
  4. Step 4: Simplify right side
    78,038.06x = 4,547,658,906.84
  5. Step 5: Solve for x
    x = 4,547,658,906.84/78,038.06
  6. Step 6: Final answer
    x = 58,274.89

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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.