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Finding the Fourth Proportional to 108,547.60, 162,821.40 and 77,054.80

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Solution

The fourth proportional to 108,547.60, 162,821.40 and 77,054.80 is: 115,582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,547.60 : 162,821.40 = 77,054.80 : x
  2. Step 2: Convert to fraction form
    108,547.60/162,821.40 = 77,054.80/x
  3. Step 3: Cross multiply
    108,547.60x = 162,821.40 × 77,054.80
  4. Step 4: Simplify right side
    108,547.60x = 12,546,170,412.72
  5. Step 5: Solve for x
    x = 12,546,170,412.72/108,547.60
  6. Step 6: Final answer
    x = 115,582.20

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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.