Home / 105,487.32-145,566.84-57,731.40

Finding the Fourth Proportional to 105,487.32, 145,566.84 and 57,731.40

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Solution

The fourth proportional to 105,487.32, 145,566.84 and 57,731.40 is: 79,666.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,487.32 : 145,566.84 = 57,731.40 : x
  2. Step 2: Convert to fraction form
    105,487.32/145,566.84 = 57,731.40/x
  3. Step 3: Cross multiply
    105,487.32x = 145,566.84 × 57,731.40
  4. Step 4: Simplify right side
    105,487.32x = 8,403,777,466.78
  5. Step 5: Solve for x
    x = 8,403,777,466.78/105,487.32
  6. Step 6: Final answer
    x = 79,666.23

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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.