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Finding the Fourth Proportional to 139,465.16, 209,031.60 and 64,480.16

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Solution

The fourth proportional to 139,465.16, 209,031.60 and 64,480.16 is: 96,643.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,465.16 : 209,031.60 = 64,480.16 : x
  2. Step 2: Convert to fraction form
    139,465.16/209,031.60 = 64,480.16/x
  3. Step 3: Cross multiply
    139,465.16x = 209,031.60 × 64,480.16
  4. Step 4: Simplify right side
    139,465.16x = 13,478,391,013.06
  5. Step 5: Solve for x
    x = 13,478,391,013.06/139,465.16
  6. Step 6: Final answer
    x = 96,643.43

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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.