Home / 78,665.04-108,557.21-42,855.07

Finding the Fourth Proportional to 78,665.04, 108,557.21 and 42,855.07

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Solution

The fourth proportional to 78,665.04, 108,557.21 and 42,855.07 is: 59,139.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,665.04 : 108,557.21 = 42,855.07 : x
  2. Step 2: Convert to fraction form
    78,665.04/108,557.21 = 42,855.07/x
  3. Step 3: Cross multiply
    78,665.04x = 108,557.21 × 42,855.07
  4. Step 4: Simplify right side
    78,665.04x = 4,652,226,833.55
  5. Step 5: Solve for x
    x = 4,652,226,833.55/78,665.04
  6. Step 6: Final answer
    x = 59,139.70

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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.