Home / 99,933.81-137,916.50-56,915.11

Finding the Fourth Proportional to 99,933.81, 137,916.50 and 56,915.11

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Solution

The fourth proportional to 99,933.81, 137,916.50 and 56,915.11 is: 78,547.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,933.81 : 137,916.50 = 56,915.11 : x
  2. Step 2: Convert to fraction form
    99,933.81/137,916.50 = 56,915.11/x
  3. Step 3: Cross multiply
    99,933.81x = 137,916.50 × 56,915.11
  4. Step 4: Simplify right side
    99,933.81x = 7,849,532,768.32
  5. Step 5: Solve for x
    x = 7,849,532,768.32/99,933.81
  6. Step 6: Final answer
    x = 78,547.32

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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.