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Finding the Fourth Proportional to 100,953.80, 151,430.70 and 99,009.80

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Solution

The fourth proportional to 100,953.80, 151,430.70 and 99,009.80 is: 148,514.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,953.80 : 151,430.70 = 99,009.80 : x
  2. Step 2: Convert to fraction form
    100,953.80/151,430.70 = 99,009.80/x
  3. Step 3: Cross multiply
    100,953.80x = 151,430.70 × 99,009.80
  4. Step 4: Simplify right side
    100,953.80x = 14,993,123,320.86
  5. Step 5: Solve for x
    x = 14,993,123,320.86/100,953.80
  6. Step 6: Final answer
    x = 148,514.70

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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.