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Finding the Fourth Proportional to 101,437.19, 139,980.80 and 56,117.69

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Solution

The fourth proportional to 101,437.19, 139,980.80 and 56,117.69 is: 77,441.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,437.19 : 139,980.80 = 56,117.69 : x
  2. Step 2: Convert to fraction form
    101,437.19/139,980.80 = 56,117.69/x
  3. Step 3: Cross multiply
    101,437.19x = 139,980.80 × 56,117.69
  4. Step 4: Simplify right side
    101,437.19x = 7,855,398,859.76
  5. Step 5: Solve for x
    x = 7,855,398,859.76/101,437.19
  6. Step 6: Final answer
    x = 77,441.01

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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.