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Finding the Fourth Proportional to 99,277.80, 148,916.70 and 57,287.40

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Solution

The fourth proportional to 99,277.80, 148,916.70 and 57,287.40 is: 85,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,277.80 : 148,916.70 = 57,287.40 : x
  2. Step 2: Convert to fraction form
    99,277.80/148,916.70 = 57,287.40/x
  3. Step 3: Cross multiply
    99,277.80x = 148,916.70 × 57,287.40
  4. Step 4: Simplify right side
    99,277.80x = 8,531,050,559.58
  5. Step 5: Solve for x
    x = 8,531,050,559.58/99,277.80
  6. Step 6: Final answer
    x = 85,931.10

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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.