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Finding the Fourth Proportional to 128,802.78, 177,542.45 and 101,534.40

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Solution

The fourth proportional to 128,802.78, 177,542.45 and 101,534.40 is: 139,955.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,802.78 : 177,542.45 = 101,534.40 : x
  2. Step 2: Convert to fraction form
    128,802.78/177,542.45 = 101,534.40/x
  3. Step 3: Cross multiply
    128,802.78x = 177,542.45 × 101,534.40
  4. Step 4: Simplify right side
    128,802.78x = 18,026,666,389.12
  5. Step 5: Solve for x
    x = 18,026,666,389.12/128,802.78
  6. Step 6: Final answer
    x = 139,955.57

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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.