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Finding the Fourth Proportional to 60,278.34, 90,417.51 and 20,813.93

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Solution

The fourth proportional to 60,278.34, 90,417.51 and 20,813.93 is: 31,220.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,278.34 : 90,417.51 = 20,813.93 : x
  2. Step 2: Convert to fraction form
    60,278.34/90,417.51 = 20,813.93/x
  3. Step 3: Cross multiply
    60,278.34x = 90,417.51 × 20,813.93
  4. Step 4: Simplify right side
    60,278.34x = 1,881,943,167.76
  5. Step 5: Solve for x
    x = 1,881,943,167.76/60,278.34
  6. Step 6: Final answer
    x = 31,220.89

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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.