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Finding the Fourth Proportional to 84,934.80, 127,402.20 and 65,312.40

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Solution

The fourth proportional to 84,934.80, 127,402.20 and 65,312.40 is: 97,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,934.80 : 127,402.20 = 65,312.40 : x
  2. Step 2: Convert to fraction form
    84,934.80/127,402.20 = 65,312.40/x
  3. Step 3: Cross multiply
    84,934.80x = 127,402.20 × 65,312.40
  4. Step 4: Simplify right side
    84,934.80x = 8,320,943,447.28
  5. Step 5: Solve for x
    x = 8,320,943,447.28/84,934.80
  6. Step 6: Final answer
    x = 97,968.60

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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.