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Finding the Fourth Proportional to 253,140.32, 349,340.64 and 139,967.12

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Solution

The fourth proportional to 253,140.32, 349,340.64 and 139,967.12 is: 193,158.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,140.32 : 349,340.64 = 139,967.12 : x
  2. Step 2: Convert to fraction form
    253,140.32/349,340.64 = 139,967.12/x
  3. Step 3: Cross multiply
    253,140.32x = 349,340.64 × 139,967.12
  4. Step 4: Simplify right side
    253,140.32x = 48,896,203,279.76
  5. Step 5: Solve for x
    x = 48,896,203,279.76/253,140.32
  6. Step 6: Final answer
    x = 193,158.50

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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.