Home / 72,389.16-99,890.28-40,551.30

Finding the Fourth Proportional to 72,389.16, 99,890.28 and 40,551.30

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Solution

The fourth proportional to 72,389.16, 99,890.28 and 40,551.30 is: 55,957.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,389.16 : 99,890.28 = 40,551.30 : x
  2. Step 2: Convert to fraction form
    72,389.16/99,890.28 = 40,551.30/x
  3. Step 3: Cross multiply
    72,389.16x = 99,890.28 × 40,551.30
  4. Step 4: Simplify right side
    72,389.16x = 4,050,680,711.36
  5. Step 5: Solve for x
    x = 4,050,680,711.36/72,389.16
  6. Step 6: Final answer
    x = 55,957.01

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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.