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Finding the Fourth Proportional to 100,957.38, 139,312.87 and 57,950.02

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Solution

The fourth proportional to 100,957.38, 139,312.87 and 57,950.02 is: 79,966.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,957.38 : 139,312.87 = 57,950.02 : x
  2. Step 2: Convert to fraction form
    100,957.38/139,312.87 = 57,950.02/x
  3. Step 3: Cross multiply
    100,957.38x = 139,312.87 × 57,950.02
  4. Step 4: Simplify right side
    100,957.38x = 8,073,183,602.76
  5. Step 5: Solve for x
    x = 8,073,183,602.76/100,957.38
  6. Step 6: Final answer
    x = 79,966.26

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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.