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Finding the Fourth Proportional to 102,953.80, 154,430.70 and 99,017.20

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Solution

The fourth proportional to 102,953.80, 154,430.70 and 99,017.20 is: 148,525.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,953.80 : 154,430.70 = 99,017.20 : x
  2. Step 2: Convert to fraction form
    102,953.80/154,430.70 = 99,017.20/x
  3. Step 3: Cross multiply
    102,953.80x = 154,430.70 × 99,017.20
  4. Step 4: Simplify right side
    102,953.80x = 15,291,295,508.04
  5. Step 5: Solve for x
    x = 15,291,295,508.04/102,953.80
  6. Step 6: Final answer
    x = 148,525.80

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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.