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Finding the Fourth Proportional to 98,845.60, 148,066.80 and 61,290.40

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Solution

The fourth proportional to 98,845.60, 148,066.80 and 61,290.40 is: 91,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,845.60 : 148,066.80 = 61,290.40 : x
  2. Step 2: Convert to fraction form
    98,845.60/148,066.80 = 61,290.40/x
  3. Step 3: Cross multiply
    98,845.60x = 148,066.80 × 61,290.40
  4. Step 4: Simplify right side
    98,845.60x = 9,075,073,398.72
  5. Step 5: Solve for x
    x = 9,075,073,398.72/98,845.60
  6. Step 6: Final answer
    x = 91,810.60

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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.