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Finding the Fourth Proportional to 85,304.80, 128,014.80 and 47,864.80

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Solution

The fourth proportional to 85,304.80, 128,014.80 and 47,864.80 is: 71,829.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,304.80 : 128,014.80 = 47,864.80 : x
  2. Step 2: Convert to fraction form
    85,304.80/128,014.80 = 47,864.80/x
  3. Step 3: Cross multiply
    85,304.80x = 128,014.80 × 47,864.80
  4. Step 4: Simplify right side
    85,304.80x = 6,127,402,799.04
  5. Step 5: Solve for x
    x = 6,127,402,799.04/85,304.80
  6. Step 6: Final answer
    x = 71,829.52

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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.