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Finding the Fourth Proportional to 415,412.11, 623,117.94 and 99,868.93

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Solution

The fourth proportional to 415,412.11, 623,117.94 and 99,868.93 is: 149,803.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,412.11 : 623,117.94 = 99,868.93 : x
  2. Step 2: Convert to fraction form
    415,412.11/623,117.94 = 99,868.93/x
  3. Step 3: Cross multiply
    415,412.11x = 623,117.94 × 99,868.93
  4. Step 4: Simplify right side
    415,412.11x = 62,230,121,931.60
  5. Step 5: Solve for x
    x = 62,230,121,931.60/415,412.11
  6. Step 6: Final answer
    x = 149,803.34

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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.