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Finding the Fourth Proportional to 139,159.76, 192,058.55 and 77,929.26

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Solution

The fourth proportional to 139,159.76, 192,058.55 and 77,929.26 is: 107,552.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,159.76 : 192,058.55 = 77,929.26 : x
  2. Step 2: Convert to fraction form
    139,159.76/192,058.55 = 77,929.26/x
  3. Step 3: Cross multiply
    139,159.76x = 192,058.55 × 77,929.26
  4. Step 4: Simplify right side
    139,159.76x = 14,966,980,678.17
  5. Step 5: Solve for x
    x = 14,966,980,678.17/139,159.76
  6. Step 6: Final answer
    x = 107,552.50

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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.