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Finding the Fourth Proportional to 103,957.79, 143,461.85 and 56,211.12

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Solution

The fourth proportional to 103,957.79, 143,461.85 and 56,211.12 is: 77,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,957.79 : 143,461.85 = 56,211.12 : x
  2. Step 2: Convert to fraction form
    103,957.79/143,461.85 = 56,211.12/x
  3. Step 3: Cross multiply
    103,957.79x = 143,461.85 × 56,211.12
  4. Step 4: Simplify right side
    103,957.79x = 8,064,150,984.72
  5. Step 5: Solve for x
    x = 8,064,150,984.72/103,957.79
  6. Step 6: Final answer
    x = 77,571.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.