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Finding the Fourth Proportional to 125,339.66, 188,128.85 and 77,810.89

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Solution

The fourth proportional to 125,339.66, 188,128.85 and 77,810.89 is: 116,790.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,339.66 : 188,128.85 = 77,810.89 : x
  2. Step 2: Convert to fraction form
    125,339.66/188,128.85 = 77,810.89/x
  3. Step 3: Cross multiply
    125,339.66x = 188,128.85 × 77,810.89
  4. Step 4: Simplify right side
    125,339.66x = 14,638,473,253.18
  5. Step 5: Solve for x
    x = 14,638,473,253.18/125,339.66
  6. Step 6: Final answer
    x = 116,790.43

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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.