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Finding the Fourth Proportional to 98,885.80, 148,328.70 and 72,317.80

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Solution

The fourth proportional to 98,885.80, 148,328.70 and 72,317.80 is: 108,476.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,885.80 : 148,328.70 = 72,317.80 : x
  2. Step 2: Convert to fraction form
    98,885.80/148,328.70 = 72,317.80/x
  3. Step 3: Cross multiply
    98,885.80x = 148,328.70 × 72,317.80
  4. Step 4: Simplify right side
    98,885.80x = 10,726,805,260.86
  5. Step 5: Solve for x
    x = 10,726,805,260.86/98,885.80
  6. Step 6: Final answer
    x = 108,476.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.