Home / 105,715.54-145,888.08-57,317.86

Finding the Fourth Proportional to 105,715.54, 145,888.08 and 57,317.86

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Solution

The fourth proportional to 105,715.54, 145,888.08 and 57,317.86 is: 79,098.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,715.54 : 145,888.08 = 57,317.86 : x
  2. Step 2: Convert to fraction form
    105,715.54/145,888.08 = 57,317.86/x
  3. Step 3: Cross multiply
    105,715.54x = 145,888.08 × 57,317.86
  4. Step 4: Simplify right side
    105,715.54x = 8,361,992,545.11
  5. Step 5: Solve for x
    x = 8,361,992,545.11/105,715.54
  6. Step 6: Final answer
    x = 79,098.99

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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.