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Finding the Fourth Proportional to 101,710.61, 140,368.95 and 56,402.80

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Solution

The fourth proportional to 101,710.61, 140,368.95 and 56,402.80 is: 77,840.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,710.61 : 140,368.95 = 56,402.80 : x
  2. Step 2: Convert to fraction form
    101,710.61/140,368.95 = 56,402.80/x
  3. Step 3: Cross multiply
    101,710.61x = 140,368.95 × 56,402.80
  4. Step 4: Simplify right side
    101,710.61x = 7,917,201,813.06
  5. Step 5: Solve for x
    x = 7,917,201,813.06/101,710.61
  6. Step 6: Final answer
    x = 77,840.48

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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.