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Finding the Fourth Proportional to 84,945.40, 117,240.90 and 56,265.40

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Solution

The fourth proportional to 84,945.40, 117,240.90 and 56,265.40 is: 77,657.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,945.40 : 117,240.90 = 56,265.40 : x
  2. Step 2: Convert to fraction form
    84,945.40/117,240.90 = 56,265.40/x
  3. Step 3: Cross multiply
    84,945.40x = 117,240.90 × 56,265.40
  4. Step 4: Simplify right side
    84,945.40x = 6,596,606,134.86
  5. Step 5: Solve for x
    x = 6,596,606,134.86/84,945.40
  6. Step 6: Final answer
    x = 77,657.01

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1.5x scale

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.