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Finding the Fourth Proportional to 128,931.60, 193,430.04 and 62,403.60

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Solution

The fourth proportional to 128,931.60, 193,430.04 and 62,403.60 is: 93,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,931.60 : 193,430.04 = 62,403.60 : x
  2. Step 2: Convert to fraction form
    128,931.60/193,430.04 = 62,403.60/x
  3. Step 3: Cross multiply
    128,931.60x = 193,430.04 × 62,403.60
  4. Step 4: Simplify right side
    128,931.60x = 12,070,730,844.14
  5. Step 5: Solve for x
    x = 12,070,730,844.14/128,931.60
  6. Step 6: Final answer
    x = 93,621.20

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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.