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Finding the Fourth Proportional to 52,598.40, 78,868.80 and 21,398.40

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Solution

The fourth proportional to 52,598.40, 78,868.80 and 21,398.40 is: 32,085.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,598.40 : 78,868.80 = 21,398.40 : x
  2. Step 2: Convert to fraction form
    52,598.40/78,868.80 = 21,398.40/x
  3. Step 3: Cross multiply
    52,598.40x = 78,868.80 × 21,398.40
  4. Step 4: Simplify right side
    52,598.40x = 1,687,666,129.92
  5. Step 5: Solve for x
    x = 1,687,666,129.92/52,598.40
  6. Step 6: Final answer
    x = 32,085.88

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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.