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Finding the Fourth Proportional to 98,121.60, 146,890.80 and 86,457.60

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Solution

The fourth proportional to 98,121.60, 146,890.80 and 86,457.60 is: 129,429.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,121.60 : 146,890.80 = 86,457.60 : x
  2. Step 2: Convert to fraction form
    98,121.60/146,890.80 = 86,457.60/x
  3. Step 3: Cross multiply
    98,121.60x = 146,890.80 × 86,457.60
  4. Step 4: Simplify right side
    98,121.60x = 12,699,826,030.08
  5. Step 5: Solve for x
    x = 12,699,826,030.08/98,121.60
  6. Step 6: Final answer
    x = 129,429.46

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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.