Home / 78,678.95-108,575.64-42,868.85

Finding the Fourth Proportional to 78,678.95, 108,575.64 and 42,868.85

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Solution

The fourth proportional to 78,678.95, 108,575.64 and 42,868.85 is: 59,158.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,678.95 : 108,575.64 = 42,868.85 : x
  2. Step 2: Convert to fraction form
    78,678.95/108,575.64 = 42,868.85/x
  3. Step 3: Cross multiply
    78,678.95x = 108,575.64 × 42,868.85
  4. Step 4: Simplify right side
    78,678.95x = 4,654,512,281.94
  5. Step 5: Solve for x
    x = 4,654,512,281.94/78,678.95
  6. Step 6: Final answer
    x = 59,158.30

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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.