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Finding the Fourth Proportional to 115,312, 159,130.56 and 62,320

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Solution

The fourth proportional to 115,312, 159,130.56 and 62,320 is: 86,001.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,312 : 159,130.56 = 62,320 : x
  2. Step 2: Convert to fraction form
    115,312/159,130.56 = 62,320/x
  3. Step 3: Cross multiply
    115,312x = 159,130.56 × 62,320
  4. Step 4: Simplify right side
    115,312x = 9,917,016,499.20
  5. Step 5: Solve for x
    x = 9,917,016,499.20/115,312
  6. Step 6: Final answer
    x = 86,001.60

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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.