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Finding the Fourth Proportional to 136,875.50, 188,888.28 and 77,259.50

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Solution

The fourth proportional to 136,875.50, 188,888.28 and 77,259.50 is: 106,618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,875.50 : 188,888.28 = 77,259.50 : x
  2. Step 2: Convert to fraction form
    136,875.50/188,888.28 = 77,259.50/x
  3. Step 3: Cross multiply
    136,875.50x = 188,888.28 × 77,259.50
  4. Step 4: Simplify right side
    136,875.50x = 14,593,414,068.66
  5. Step 5: Solve for x
    x = 14,593,414,068.66/136,875.50
  6. Step 6: Final answer
    x = 106,618.16

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1.5x scale

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.