Home / 105,421.98-145,432.08-65,121.24

Finding the Fourth Proportional to 105,421.98, 145,432.08 and 65,121.24

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Solution

The fourth proportional to 105,421.98, 145,432.08 and 65,121.24 is: 89,836.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,421.98 : 145,432.08 = 65,121.24 : x
  2. Step 2: Convert to fraction form
    105,421.98/145,432.08 = 65,121.24/x
  3. Step 3: Cross multiply
    105,421.98x = 145,432.08 × 65,121.24
  4. Step 4: Simplify right side
    105,421.98x = 9,470,717,385.38
  5. Step 5: Solve for x
    x = 9,470,717,385.38/105,421.98
  6. Step 6: Final answer
    x = 89,836.27

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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.