Home / 78,437.10-117,655.65-72,901.26

Finding the Fourth Proportional to 78,437.10, 117,655.65 and 72,901.26

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Solution

The fourth proportional to 78,437.10, 117,655.65 and 72,901.26 is: 109,351.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,437.10 : 117,655.65 = 72,901.26 : x
  2. Step 2: Convert to fraction form
    78,437.10/117,655.65 = 72,901.26/x
  3. Step 3: Cross multiply
    78,437.10x = 117,655.65 × 72,901.26
  4. Step 4: Simplify right side
    78,437.10x = 8,577,245,131.12
  5. Step 5: Solve for x
    x = 8,577,245,131.12/78,437.10
  6. Step 6: Final answer
    x = 109,351.89

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1.5x scale

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.