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Finding the Fourth Proportional to 124,501.60, 186,946.80 and 72,013.60

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Solution

The fourth proportional to 124,501.60, 186,946.80 and 72,013.60 is: 108,132.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,501.60 : 186,946.80 = 72,013.60 : x
  2. Step 2: Convert to fraction form
    124,501.60/186,946.80 = 72,013.60/x
  3. Step 3: Cross multiply
    124,501.60x = 186,946.80 × 72,013.60
  4. Step 4: Simplify right side
    124,501.60x = 13,462,712,076.48
  5. Step 5: Solve for x
    x = 13,462,712,076.48/124,501.60
  6. Step 6: Final answer
    x = 108,132.84

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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.