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Finding the Fourth Proportional to 144,807.60, 217,211.40 and 139,969.20

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Solution

The fourth proportional to 144,807.60, 217,211.40 and 139,969.20 is: 209,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    144,807.60 : 217,211.40 = 139,969.20 : x
  2. Step 2: Convert to fraction form
    144,807.60/217,211.40 = 139,969.20/x
  3. Step 3: Cross multiply
    144,807.60x = 217,211.40 × 139,969.20
  4. Step 4: Simplify right side
    144,807.60x = 30,402,905,888.88
  5. Step 5: Solve for x
    x = 30,402,905,888.88/144,807.60
  6. Step 6: Final answer
    x = 209,953.80

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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.