Home / 171,681.10-257,598.45-78,138.70

Finding the Fourth Proportional to 171,681.10, 257,598.45 and 78,138.70

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Solution

The fourth proportional to 171,681.10, 257,598.45 and 78,138.70 is: 117,243.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,681.10 : 257,598.45 = 78,138.70 : x
  2. Step 2: Convert to fraction form
    171,681.10/257,598.45 = 78,138.70/x
  3. Step 3: Cross multiply
    171,681.10x = 257,598.45 × 78,138.70
  4. Step 4: Simplify right side
    171,681.10x = 20,128,408,005.02
  5. Step 5: Solve for x
    x = 20,128,408,005.02/171,681.10
  6. Step 6: Final answer
    x = 117,243.00

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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.