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Finding the Fourth Proportional to 94,710.80, 141,893.40 and 77,085.20

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Solution

The fourth proportional to 94,710.80, 141,893.40 and 77,085.20 is: 115,487.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    94,710.80 : 141,893.40 = 77,085.20 : x
  2. Step 2: Convert to fraction form
    94,710.80/141,893.40 = 77,085.20/x
  3. Step 3: Cross multiply
    94,710.80x = 141,893.40 × 77,085.20
  4. Step 4: Simplify right side
    94,710.80x = 10,937,881,117.68
  5. Step 5: Solve for x
    x = 10,937,881,117.68/94,710.80
  6. Step 6: Final answer
    x = 115,487.16

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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.