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Finding the Fourth Proportional to 102,953.80, 154,430.70 and 98,142.40

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Solution

The fourth proportional to 102,953.80, 154,430.70 and 98,142.40 is: 147,213.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,953.80 : 154,430.70 = 98,142.40 : x
  2. Step 2: Convert to fraction form
    102,953.80/154,430.70 = 98,142.40/x
  3. Step 3: Cross multiply
    102,953.80x = 154,430.70 × 98,142.40
  4. Step 4: Simplify right side
    102,953.80x = 15,156,199,531.68
  5. Step 5: Solve for x
    x = 15,156,199,531.68/102,953.80
  6. Step 6: Final answer
    x = 147,213.60

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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.