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Finding the Fourth Proportional to 99,112.80, 148,669.20 and 57,122.40

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Solution

The fourth proportional to 99,112.80, 148,669.20 and 57,122.40 is: 85,683.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,112.80 : 148,669.20 = 57,122.40 : x
  2. Step 2: Convert to fraction form
    99,112.80/148,669.20 = 57,122.40/x
  3. Step 3: Cross multiply
    99,112.80x = 148,669.20 × 57,122.40
  4. Step 4: Simplify right side
    99,112.80x = 8,492,341,510.08
  5. Step 5: Solve for x
    x = 8,492,341,510.08/99,112.80
  6. Step 6: Final answer
    x = 85,683.60

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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.