Home / 118,929.57-164,130.40-78,572.63

Finding the Fourth Proportional to 118,929.57, 164,130.40 and 78,572.63

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Solution

The fourth proportional to 118,929.57, 164,130.40 and 78,572.63 is: 108,435.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,929.57 : 164,130.40 = 78,572.63 : x
  2. Step 2: Convert to fraction form
    118,929.57/164,130.40 = 78,572.63/x
  3. Step 3: Cross multiply
    118,929.57x = 164,130.40 × 78,572.63
  4. Step 4: Simplify right side
    118,929.57x = 12,896,157,699.49
  5. Step 5: Solve for x
    x = 12,896,157,699.49/118,929.57
  6. Step 6: Final answer
    x = 108,435.25

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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.