Home / 99,343.62-137,123.75-56,930.40

Finding the Fourth Proportional to 99,343.62, 137,123.75 and 56,930.40

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Solution

The fourth proportional to 99,343.62, 137,123.75 and 56,930.40 is: 78,580.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,343.62 : 137,123.75 = 56,930.40 : x
  2. Step 2: Convert to fraction form
    99,343.62/137,123.75 = 56,930.40/x
  3. Step 3: Cross multiply
    99,343.62x = 137,123.75 × 56,930.40
  4. Step 4: Simplify right side
    99,343.62x = 7,806,509,937
  5. Step 5: Solve for x
    x = 7,806,509,937/99,343.62
  6. Step 6: Final answer
    x = 78,580.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.