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Finding the Fourth Proportional to 60,666.30, 90,999.45 and 21,227.40

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Solution

The fourth proportional to 60,666.30, 90,999.45 and 21,227.40 is: 31,841.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,666.30 : 90,999.45 = 21,227.40 : x
  2. Step 2: Convert to fraction form
    60,666.30/90,999.45 = 21,227.40/x
  3. Step 3: Cross multiply
    60,666.30x = 90,999.45 × 21,227.40
  4. Step 4: Simplify right side
    60,666.30x = 1,931,681,724.93
  5. Step 5: Solve for x
    x = 1,931,681,724.93/60,666.30
  6. Step 6: Final answer
    x = 31,841.10

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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.